Functional unit for electrical connection enclosure, and electrical connection enclosure comprising such a functional unit

ABSTRACT

A monitoring-and-control drawer (138) for an electrical connection enclosure comprises a front part (300) comprising a ventilation grille (326), a back portion (348) at which a back ventilation region is provided and functional elements (362). The heat generated by the functional elements is removed by an air flow (FL1) which enters the functional unit via each air grating in the front part and re-emerges from the functional unit via the back ventilation region, having passed right through the functional unit. The back portion belongs to a base of the drawer to which the functional elements are attached and comprises a group of upstream connectors (354) connected to an electricity source, a group of downstream connectors (356) connected to an electrical load and a ventilation orifice (358) which is part of to the back ventilation region and which is located between the group of upstream connectors and the group of downstream connectors.

TECHNICAL FIELD

The present invention relates to a monitoring-and-control drawer for anelectrical connection enclosure and to an electrical connectionenclosure comprising at least one such monitoring-and-control drawer.

BACKGROUND

In the field of electrical enclosures, it is known practice to installin an electrical connection enclosure one or more functional units, suchas monitoring-and-control drawers. These functional units comprise, forexample, electrical components which allow external electrical loads tobe connected or the electrical enclosure to be controlled. Duringoperation, these electrical components generate heat. It is knownpractice to equip the front face of such functional units withventilation grilles and potentially with fans, allowing the air insidethe functional unit to be replenished and thereby remove the heatproduced by electrical components. However, the flow of air through sucha functional unit is not optimized and does not allow the heat producedto be removed effectively. Air enters and exits these units via theirfront face, which is not very effective in terms of cooling because theroute followed by the air is complex, and it is therefore slowed down.

JP-U-S53 73428 describes an electrical enclosure comprising a functionalunit cooled by a flow of air entering through its front face and leavingthrough its rear face. This air flow passes through the functional unitin an upward direction, so that turning the functional unit over is notpossible without degrading the circulation of the air flow, whichnaturally tends to rise as it heats up. The functional unit is then notmodular, as it is not possible to adapt its spatial orientation to thespecific needs of each enclosure.

SUMMARY

It is these drawbacks that the invention more particularly aims toovercome by proposing a monitoring-and-control drawer of which the heatmanagement is improved while remaining modular.

To that end, the invention relates to a monitoring-and-control drawerfor an electrical connection enclosure comprising a frontal portion, aback portion and functional elements, the functional elements generatingheat. The frontal portion of the monitoring-and-control drawer comprisesat least one ventilation grille; the monitoring-and-control drawercomprises a back ventilation region formed at the level of the backportion; the heat generated by the functional elements of themonitoring-and-control drawer is removed by the air flow flowing throughthe monitoring-and-control drawer; and the air flow enters into themonitoring-and-control drawer via each ventilation grille in the frontalportion and exits from the monitoring-and-control drawer via the backventilation region, going through the monitoring-and-control drawer fromone side to the other. The monitoring-and-control drawer is configuredto be connected on the one hand to an electricity source and on theother hand to an electrical load, the functional elements beingconfigured to control the electrical load. The monitoring-and-controldrawer is configured to be able to be inserted into and removed from theelectrical connection enclosure by sliding.

According to the invention, the monitoring-and-control drawer comprisesa horizontal base on which the functional elements are attached, and acover, the back portion of the monitoring-and-control drawer is part ofthe base and comprises a group of upstream connectors, a group ofdownstream connectors and a ventilation orifice which is part of theback ventilation region, the upstream connectors and the downstreamconnectors allows the monitoring-and-control drawer to be connected tothe electricity source and to the electrical load respectively, and theventilation orifice is located between the group of upstream connectorsand the group of downstream connectors.

By virtue of the invention, an air flow passes through the functionalunit from one side to the other which allows the heat produced by thefunctional elements to be removed effectively. In addition, the controldrawer is easily flipped over without reducing the cooling performanceof the airflow, making the control drawer particularly modular.

According to some advantageous but non-mandatory aspects of theinvention, the monitoring-and-control drawer incorporates one or more ofthe following features, either alone or in any technically permissiblecombination:

-   -   The monitoring-and-control drawer is configured so that the air        flow passes through the monitoring-and-control drawer without        significant change in direction.    -   The monitoring-and-control drawer comprises at least one fan        installed in order to force the air flow through the        monitoring-and-control drawer and arranged in the back        ventilation region and/or on the ventilation grille of the        frontal portion.    -   The monitoring-and-control drawer comprises a control circuit        board and the one or more fans are controlled by the control        circuit board.    -   The monitoring-and-control drawer comprises at least one        radiator arranged on at least one functional element and        configured to improve the exchange of heat with the air flow        and, preferably, comprises at least one deflector configured to        direct the air flow towards the one or more radiators.

According to another aspect, the invention relates to an electricalconnection enclosure. According to the invention, the electricalenclosure comprises at least one monitoring-and-control drawer asdescribed above, a back face of the electrical enclosure comprisesventilation grilles and the air flow exiting from eachmonitoring-and-control drawer exits from the electrical enclosure viathe ventilation grilles.

This electrical connection enclosure has the same advantages as thosementioned above with respect to the monitoring-and-control drawer of theinvention.

According to another aspect, the invention also relates to an electricalconnection enclosure. According to the invention, the electricalenclosure comprises at least one monitoring-and-control drawer asdescribed above, the electrical enclosure comprises at least one chimneyfor the escape of hot air, the air flow from each monitoring-and-controldrawer exits into the chimney for the escape of hot air and the hot airfrom each monitoring-and-control drawer escapes via an upper face of theescape chimney.

Advantageously, this electrical connection enclosure comprises at leastone extraction fan, each extraction fan being arranged on the upper faceof an escape chimney.

This electrical connection enclosure has the same advantages as thosementioned above with respect to the monitoring-and-control drawer of theinvention.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be better understood and other advantages thereofwill become more clearly apparent in the light of the followingdescription of one embodiment of an electrical connection enclosure andof a monitoring-and-control drawer in accordance with its principle,given solely by way of example and with reference to the appendeddrawings, in which:

FIG. 1 is a perspective view of an electrical enclosure in accordancewith the invention;

FIG. 2 is a longitudinal section of the electrical enclosure of FIG. 1along the plane II;

FIG. 3 is a horizontal section of a portion of the electrical enclosureof FIG. 1 along the plane III;

FIG. 4 is a horizontal section, analogous to FIG. 3, of a secondelectrical enclosure in accordance with the invention;

FIG. 5 is a horizontal section, analogous to FIG. 3, of a thirdelectrical enclosure in accordance with the invention;

FIG. 6 is a perspective view of a communication module belonging to anenclosure according to one of FIGS. 1 to 5, this module being inaccordance with the invention;

FIG. 7 is a view from above of the communication module of FIG. 6;

FIG. 8 is a perspective view of one motor start-up module belonging toan enclosure according to one of FIGS. 1 to 5;

FIG. 9 is a perspective view of another motor start-up module, viewedfrom another angle;

FIG. 10 is a perspective view of a support structure for the motorstart-up module of FIGS. 8 and 9;

FIG. 11 is a perspective view of a protection unit for the motorstart-up module of FIGS. 8 and 9;

FIG. 12 is a perspective view of the protection unit of FIG. 11, viewedfrom another angle;

FIG. 13 is a perspective view of a monitoring-and-control unit belongingto an enclosure according to one of FIGS. 1 to 5, this unit being inaccordance with the invention;

FIG. 14 is a perspective view of the monitoring-and-control unit of FIG.13, viewed from another angle;

FIG. 15 is a perspective view of a second monitoring-and-control unitbelonging to an enclosure according to one of FIGS. 1 to 5, this secondunit being in accordance with the invention;

FIG. 16 is a perspective view of the second monitoring-and-control unitof FIG. 15, viewed from another angle;

FIG. 17 is a view from above of the second monitoring-and-control unitof FIG. 15, in section along the plane XVII in FIG. 15;

FIG. 18 is a perspective view of a mobile lateral contact belonging toan enclosure according to one of FIGS. 1 to 5;

FIG. 19 is a perspective view of the mobile lateral contact of FIG. 18viewed from another angle;

FIG. 20 is an exploded perspective view of the mobile lateral contact ofFIGS. 18 and 19;

FIG. 21 is a view from above of the mobile lateral contact of FIGS. 18and 19 in a first position;

FIG. 22 is a view from above of the mobile lateral contact of FIGS. 18and 19 in a second position;

FIG. 23 is a view from above of the mobile lateral contact of FIGS. 18and 19 in a third position;

FIG. 24 is a perspective view of an input-output module belonging to anenclosure according to one of FIGS. 1 to 5;

FIG. 25 is a perspective view of a segment of computer bus belonging toan enclosure according to one of FIGS. 1 to 5;

FIG. 26 is a view of the detail XXV of FIG. 25;

FIG. 27 is a perspective view of a computer bus connector;

FIG. 28 is a perspective view of a first external connection modulebelonging to an enclosure according to one of FIGS. 1 to 5;

FIG. 29 is an exploded perspective view of the first external connectionmodule of FIG. 28;

FIG. 30 is a perspective view of a second external connection modulebelonging to an enclosure according to one of FIGS. 1 to 5;

FIG. 31 is an exploded perspective view of the second externalconnection module of FIG. 30;

FIG. 32 is a perspective view of a third external connection modulebelonging to an enclosure according to one of FIGS. 1 to 5;

FIG. 33 is an exploded perspective view of the third external connectionmodule of FIG. 32;

FIG. 34 is a perspective view of the segment of computer bus of FIGS. 25and 26 equipped with three jumpers;

FIG. 35 is a perspective view of the jumpers of FIG. 34;

FIG. 36 is a detail view of the locking system for themonitoring-and-control drawer of FIGS. 15 to 17, in a first position;

FIG. 37 is a detail view of the locking system for themonitoring-and-control drawer of FIGS. 15 to 17, in a second position;

FIG. 38 is a perspective view of the locking system of FIG. 36, in whicha portion of the drawer is hidden and a rail belonging to an enclosureaccording to one of FIGS. 1 to 5 is also shown;

FIG. 39 is a perspective view of the locking system of FIG. 37, in whicha portion of the drawer is hidden and a rail belonging to an enclosureaccording to one of FIGS. 1 to 5 is also shown;

FIG. 40 is a perspective view of the locking system of FIG. 37, in whicha portion of the drawer is hidden;

FIG. 41 is a perspective view of a third monitoring-and-control drawerbelonging to an enclosure according to one of FIGS. 1 to 5, this thirddrawer being in accordance with the invention;

FIG. 42 is a perspective view of the monitoring-and-control drawer ofFIG. 41, viewed from another angle; and

FIG. 43 is a perspective view of a position detection module belongingto the monitoring-and-control drawer of FIGS. 41 and 42.

DETAILED DESCRIPTION

An electrical enclosure 100 is shown in FIGS. 1 to 5. This electricalenclosure is intended to be integrated into an electrical network(partially shown). This electrical network comprises, on the one hand,upstream of the electrical enclosure 100, power supply cables 102 comingfor example from a transformer station and, on the other hand,downstream of the electrical enclosure, one or more electrical loads104.

The electrical enclosure 100 is a connection enclosure configured toconnect the electrical loads 104 to the power supply cables 102.

In the installed configuration of the electrical enclosure 100, theenclosure rests on a horizontal surface represented by a plane P1. Inpractice, the plane P1 is for example the floor of a building in whichthe electrical enclosure 100 is installed.

A longitudinal X-axis of the electrical enclosure 100 is defined asbeing the axis of the largest dimension of the electrical enclosure 100,in practice its length, a transverse Y-axis as being the axis of thesmallest dimension of the electrical enclosure 100 and perpendicular tothe X-axis, in practice its width, and a vertical Z-axis as being thethird axis of an orthogonal coordinate system comprising the X- andY-axes.

The orientation of the X-, Y- and Z-axes is rigidly linked to theorientation of the electrical enclosure 100. The orientation of theelectrical enclosure 100 described in the present disclosure correspondsto its installed configuration. It is therefore understood that theorientation of the X-, Y- and Z-axes varies when the orientation of theelectrical enclosure 100 varies. For example, the Z-axis might not bevertical when the enclosure 100 is not in the installed configuration,for example when it is being transported. The modifiers “top”, “bottom”and “vertical” used throughout the rest of the disclosure are meantrelative to the Z-axis.

In the installed configuration described here, the plane formed by theX- and Y-axes is horizontal and parallel to the plane P1, while theZ-axis is perpendicular to this plane. The modifier “horizontal” usedthroughout the rest of the disclosure applies to any element containedin a plane parallel to the plane formed by the X- and Y-axes, in theinstalled configuration of the electrical enclosure 100. The modifiers“left” and “right” are meant relative to the X-axis and the modifiers“front” and “back” are meant relative to the Y-axis.

The relative positioning of the parts and their orientation describedbelow are given by way of example only and are not limiting. Unlessexplicitly mentioned otherwise, they are meant in the mounted andinstalled configuration of the electrical enclosure 100. Thus, whenmention is made of the orientation of a part in relation to the X-, Y-and/or Z-axes, it is meant in the mounted configuration of theenclosure. When the enclosure 100 is stored, transported, unassembled orbeing assembled, among other examples, the orientation of the parts andtheir relative positioning may vary.

“F1” denotes the front face of the enclosure 100, “F2” denotes its backface, “F3” denotes its lower face, “F4” denotes its upper face, “F5”denotes its left face and “F6” denotes its right face. These faces F1 toF6 are overall planar. In practice, the face F3 of the enclosure istherefore arranged on the plane P1.

The power supply cable 102 delivers to the electrical enclosure 100 amain electrical power supply, preferably with a voltage of 400 V andwhich is three-phase with neutral, preferably at a frequency of 50 Hz.As a variant, the power supply cable 102 delivers a three-phase currentwithout neutral, or a single-phase current.

The electrical loads 104 may for example be electric motors, such asthree-phase motors, electricity distribution networks, or drivableelectrical loads, such as batteries or photovoltaic panels.

As can be seen in FIG. 1, the electrical enclosure 100 comprises a powersupply column 106, at least one electrical distributing column 108 andat least one connection column 110.

The power supply 106, distribution 108 and connection 110 columns arejuxtaposed along the X-axis.

In the example shown, the electrical enclosure 100 comprises anelectrical distributing column 108 and two connection columns 110,arranged on either side of the electrical distributing column 108. Inpractice, a connection column 110 is always juxtaposed with anelectrical distributing column 108. An electrical distributing column108 is always juxtaposed with one or with two connection columns 110.

As can be seen in FIG. 3, the association of an electrical distributingcolumn 108 and of one or of two connection columns 110 forms afunctional column 111.

When a functional column 111 comprises two connection columns 110, thesetwo columns are located respectively on either side, namely to the leftand to the right in FIGS. 1 to 5, of the electrical distributing column108. When a functional column 111 comprises just one connection column110, this column is located indiscriminately, on one side or on theother, namely to the left or to the right in FIGS. 1 to 5, of theelectrical distributing column 108.

Two other embodiments of a functional column 111 are visible in FIGS. 4and 5 and are described below.

In the example shown in FIGS. 1 to 3, the electrical enclosure 100comprises one functional column 111.

As a variant (not shown) of the invention, the electrical enclosure 100comprises a plurality of functional columns 111, juxtaposed along theX-axis.

In the example shown, a functional column 111 has a height H1, measuredalong the Z-axis, of 2000 mm. As a variant, this height is different,for example 1500 mm or 2500 mm.

The height H1 also corresponds to the height of the electrical enclosure100.

The power supply column 106 makes it possible to supply all of theelectrical enclosure 100 with electrical power from the power supplycable 102. Preferably, the power supply column is arranged at onelongitudinal end of the enclosure 100, like in the example shown, wherethe power supply column is to the left of the enclosure 100.

As can be seen in FIG. 2, in the power supply column 106, each phase andthe neutral of the power supply cable 102 are connected to an input of acircuit breaker 112.

As can be seen in FIGS. 2 and 3, the power supply column 106 alsocomprises a set of power supply busbars 114 comprising a plurality ofpower supply busbars 116. Each output of the circuit breaker 112 isconnected to a power supply busbar 116. Thus, in the example of anelectrical enclosure 100 supplied with three-phase current with neutral,the set of busbars 114 of the column 106 comprises four power supplybusbars 116, corresponding to the three phases and to the neutral of thesupply current.

The set of power supply busbars 114 is connected to a horizontal set ofbusbars 118. The horizontal set of busbars 118 comprises a plurality ofhorizontal busbars 120, in practice the same number of horizontalbusbars 120 and of busbars 116. Thus, each busbar 116 of the set ofpower supply busbars 114 is connected to a busbar 120 of the horizontalset of busbars 118.

The horizontal set of busbars 118 extends along the longitudinal X-axisof the electrical enclosure 100 and makes it possible to supply power toeach electrical distributing column 108 of the enclosure. A horizontalduct 119 is produced along the entire length of the electrical enclosure100 and accommodates the horizontal set of busbars 118.

In the example of FIGS. 1 to 3, the horizontal duct 119 is positioned atthe top end of the electrical enclosure 100. As a variant (not shown) ofthe invention, the horizontal duct 119 is positioned at the bottom endof the electrical enclosure 100.

Each electrical distributing column 108 comprises a vertical set ofbusbars 122 which makes it possible to supply power to the or eachconnection column 110 adjacent to each electrical distributing column108. In the example shown, the enclosure 100 therefore comprises avertical set of busbars which makes it possible to supply power to thetwo connection columns 110.

Each vertical set of busbars 122 comprises a plurality of verticalbusbars 124, in practice the same number of vertical busbars 124 and ofhorizontal busbars 120. Each vertical busbar 124 is connected to ahorizontal busbar 120. The connection of the vertical set of busbars 122to the horizontal set of busbars 118 takes place in the horizontal duct119.

The power supply busbars 116, the horizontal busbars 120 and thevertical busbars 124 are made of an electrically conductive material,for example of copper, and are preferably flat busbars. Preferably, theyhave a cross section of between 250 and 3000 mm².

The assembly of a power supply busbar 116, of a horizontal busbar 120and of a vertical busbar 124 per electrical distributing column 108forms an electrical power supply line.

In the example shown, the enclosure 100 comprises four electrical powersupply lines, corresponding to the three phases and to the neutral ofthe supply current coming from the cable 102. Other variants areconceivable, for example an electrical enclosure 100 supplied withsingle-phase current or with three-phase current without neutral,comprising two busbars and three busbars per set of busbars,respectively.

The circuit breaker 112 is connected between the power supply cable 102and the electrical power supply lines and therefore makes it possible tocut the supply of power to each electrical power supply line. Thecircuit breaker 112 is therefore a protection member for protecting theelectrical enclosure 100.

Each connection column 110 allows the electrical connection of one ormore electrical loads 104 to the electrical enclosure 100 and makes itpossible to monitor the electrical loads 104 which are connectedthereto.

Each connection column 110 comprises a portion of the horizontal duct119. This portion of the horizontal duct 119 extends over the entirelength of the connection column 110, along the X-axis, and accommodatesa portion of the horizontal set of busbars 118.

The electrical enclosure 100 is monitored by an industrial computer 130,shown only in FIG. 2 for clarity of the drawing, which is connected tothe electrical enclosure by communication cables 132. This industrialcomputer makes it possible to control the connection columns 110.

In practice, the industrial computer 130 comprises a computing unit (notshown) which executes software for managing the electrical enclosure100.

As a variant, the industrial computer 130 is replaced with a real-timesupervisory control and data acquisition or “SCADA” system, whichsupervises the operation of the electrical enclosure 100, or thecomputer is integrated into such a system.

Each connection column 110 comprises a communication module 134. As canbe seen in FIG. 2, the communication module 134 is positioned close tothe top end of the connection column 110, and close to the horizontalduct 119.

As a variant (not shown) of the invention, the communication module 134is positioned at the bottom end of the column.

As a variant (not shown) of the invention, when the horizontal duct 119is positioned at the bottom end of the electrical enclosure 100, thecommunication module 134 may be positioned either at the top end of theconnection column 110, or close to the bottom end of the column, abovethe horizontal duct.

The communication module 134 makes it possible to centralize all of theinformation coming from the connection column 110 and to control theconnection column. The content and the role of this information aredescribed in detail below.

The communication module 134 communicates with the industrial computer130 via communication cables 132, on the one hand to transmitinformation on the operation of the connection column 110 and on theother hand to receive the commands from the industrial computer thathave to be transmitted to the connection column.

The communication module 134 of a connection column 110 therefore actsas intermediary between the industrial computer 130 and this connectioncolumn 110 and makes it possible to centralize the exchanges between thecomputer and the column.

As can be seen in FIG. 6, each communication module 134 comprises inpractice a controlled network switch 135, called a “managed switch”.

When the electrical enclosure 100 comprises a plurality of connectioncolumns 110, like in the example shown in FIGS. 1 to 3, thecommunication modules 134 of each connection column are connected to oneanother in series by internal communication cables 136. In practice, itis the managed switches 135 of the communication modules which areconnected to one another by the internal communication cables 136.

In addition, in such a configuration, the managed switches of thecommunication modules 134 are all connected to a central switch 137 bythe internal communication cables 136, the central switch 137 preferablybeing arranged in the power supply column 106. This central switch 137acts as intermediary between the communication modules 134 and theindustrial computer 130, i.e. the information from the industrialcomputer 130, for example commands, is distributed between thecommunication modules by the central switch 137 and the information fromthe communication modules 134 is aggregated by the central switch beforebeing transmitted to the industrial computer.

Thus, each managed switch 135 is connected to the industrial computer130, independently of the other managed switches 135.

Such a configuration has the advantage of making the operation of theelectrical enclosure 100 more reliable. Specifically, in the event offailure of a communication module 134, only the operation of theconnection column 110 comprising this module will be affected since, theother fault-free modules being interconnected and connected to thecentral switch 137, their connection to the industrial computer 130 willnot be interrupted by the faulty module.

As a variant, when the electrical enclosure 100 comprises a plurality ofconnection columns 110, the managed switch 135 of each communicationmodule 134 is directly connected to the industrial computer, withoutgoing through a switch of the type of switch 137.

Optionally, when the electrical enclosure 100 comprises just oneconnection column 110, a central switch 137 is arranged between thecommunication module and the industrial computer.

In the example shown, the internal communication cables 136 are cablesusing the Ethernet protocol. As a variant, the internal communicationcables 136 use another local area network protocol, such as for examplethe MODBUS or PROFINET protocol.

To allow the connection of the electrical loads 104, each connectioncolumn 110 comprises one or more monitoring-and-control units 138.

Since the electrical loads 104 are remote from the enclosure 100, theirconnection to the monitoring-and-control units 138 takes place viaconnection cables 139.

In the example shown, the monitoring-and-control units 138 aremonitoring-and-control drawers which may therefore be installed in, andremoved from, the connection column 110 simply and quickly. As a variant(not shown) of the invention, the monitoring-and-control units 138 arefixed units of the enclosure, which are assembled during theinstallation of the enclosure, for example by screwing into the one ormore columns 110.

In practice, a monitoring-and-control unit 138 allows the electricalconnection of an electrical load 104.

In the example shown, a connection column 110 comprises up to thirtymonitoring-and-control units 138 and therefore allows the connection ofa maximum of thirty electrical loads 104. A connection column 110 ismodular, i.e. it is possible to install therein as manymonitoring-and-control units as desired, between one unit and thirtyunits. The monitoring-and-control units 138 are vertically juxtaposed inthe connection column 110.

As a variant, a connection column 110 may comprise more than thirtymonitoring-and-control units 138, for example if the height of amonitoring-and-control unit is decreased or if the height of theconnection column 110 is increased.

The monitoring-and-control units 138 also allow the electrical loads 104to which they are connected to be controlled. This control, also calleddriving, consists, for example, when the electrical load is a motor, indriving this motor, i.e. in starting it up, stopping it and potentiallyin controlling its speed, or, when the electrical load is a distributionnetwork, in delivering the voltage and the current required for theproper functioning of this distribution network.

Additionally, the monitoring-and-control units 138 also allow thesurveillance of the electrical loads 104 to which they are connected.This surveillance consists for example in measuring the voltage and thecurrent delivered to the load 104, or in retrieving information fromsensors such as for example position or rotational speed sensors, ortemperature sensors when the load 104 is a motor.

Thus, each monitoring-and-control unit 138 may have a role of connectingan electrical load 104, of controlling this load and of monitoring thisload. However, depending on the type of electrical load 104 connected toa monitoring-and-control unit 138, this monitoring-and-control unitmight not have a role of driving this load, or might not have a role ofcontrolling the load.

As can be seen in FIGS. 2 and 3, each connection column 110 comprisesone or more protection units 140. Each protection unit 140 is configuredto electrically protect one or more monitoring-and-control units 138 andthe electrical loads 104 which are connected to thesemonitoring-and-control units, in particular in the event of failure ofan electrical load 104, such as for example a short circuit.

The protection units 140 are, for example, circuit breakers arrangedupstream of the monitoring-and-control units 138 and make it possible tointerrupt the electric current supplying the loads 104 via themonitoring-and-control units 138 in the event of an incident, forexample in the event of a short circuit. In other words, the protectionunits 140 control the supply of electricity to themonitoring-and-control units 138.

Thus, the protection units 140 of a functional column 111 are arrangedbetween the monitoring-and-control units 138 and the vertical set ofbusbars 122 of the electrical distributing column 108 of this functionalcolumn 111 and make it possible to supply power to thesemonitoring-and-control units 138, from said vertical set of busbars 122.The electrical connection of the protection units 140 to the verticalset of busbars 122 takes place, in a known manner, for example via setsof horizontal rigid busbars, sets of flexible busbars or via electricalcables (not shown).

In other words, the vertical set of busbars 122 is a source ofelectricity for each protection unit 140.

In the case that a protection unit 140 is a circuit breaker, itselectrical connection and its operation are identical to those of thecircuit breaker 112.

Each protection unit 140 protects one or more monitoring-and-controlunits 138.

As can be seen in FIG. 2, each connection column 110 comprises acomputer bus 142, which connects the communication module 134 of aconnection column to all of the monitoring-and-control units 138 of thiscolumn. Each monitoring-and-control unit 138 is therefore connected to acommunication module 134.

In the example shown, the computer bus 142 is a housing comprising acircuit board, i.e. a printed circuit board, of elongate shape, arrangedvertically in the connection column 110. This circuit board compriseselectronic circuits 144, or tracks, visible in FIG. 25, allowing thecommunication, i.e. the exchange of data, in the column for exampleusing the Ethernet protocol, from each monitoring-and-control unit 138to the managed switch 135 of the communication module 134 and from themanaged switch of the communication module to eachmonitoring-and-control unit. In other words, these data travel throughthe electronic circuits 144 of the computer bus 142.

By virtue of the computer bus 142, the managed switch 135 of eachconnection column 110 controls each monitoring-and-control unit 138 ofthis connection column and aggregates the data from themonitoring-and-control units.

The monitoring-and-control units 138 are connected to the computer bus142.

Each computer bus 142 also comprises electrical power supply tracks 148,visible in FIG. 25, configured to conduct a first auxiliary voltage,which makes it possible to supply the monitoring-and-control units 138with the first auxiliary voltage, this first auxiliary voltage beingrequired for the operation of certain components of themonitoring-and-control units 138, described in detail below. This firstauxiliary voltage comes from the communication module 134 of eachconnection column 110. This first auxiliary voltage is for example a DCvoltage of 48 V.

As a variant, the first auxiliary voltage is a voltage of another value,such as for example 12 V, 24 V, 110 V DC or 110 VAC.

To deliver this first auxiliary voltage, the communication module 134comprises at least one power supply block 150.

When the electrical enclosure 100 comprises a plurality of connectioncolumns 110, each communication module 134 comprises at least one powersupply block 150.

Optionally, each communication module 134 comprises two power supplyblocks 150 which have redundancy, like in the example shown in FIGS. 6and 7.

Such a configuration is advantageous since in the event of failure of apower supply block 150, the operation of the communication module 134containing this block and the operation of the connection column 110containing this module are not interrupted.

Each computer bus 142 also comprises electrical power supply tracks 154,visible in FIG. 25, configured to conduct a second auxiliary voltage,which is preferably an AC voltage of 230 V. This second auxiliaryvoltage supplies power to electrical loads 104. This second auxiliaryvoltage comes from the communication module 134 of each connectioncolumn 110.

In one exemplary embodiment, the computer bus 142 is a printed circuitboard with six layers, the electrical power supply tracks 148 and 154and the electronic circuits 144 being distributed between these sixlayers. As a variant, the computer bus 142 comprises a different numberof layers.

As a variant, the electrical power supply tracks 148 and 154 of thecomputer bus 142 are replaced with electrical cables attached to thecomputer bus.

By virtue of the computer bus 142, it is possible to centralize on aphysical single support the first and second auxiliary electricalcircuits and the communication circuits connecting a communicationmodule 134 of a connection column 110 to the monitoring-and-controlunits 138 of this column.

FIG. 3 illustrates the interior arrangement of a functional column 111of the electrical enclosure 100 of FIGS. 1 and 2. In particular, FIG. 3illustrates the different regions that each connection column 110comprises, namely:

-   -   a functional region 156, which comprises the        monitoring-and-control units 138 and the protection units 140        and which is adjacent to the electrical distributing column 108        such that the protection units 140 are arranged between the        electrical distributing column and the monitoring-and-control        units;    -   a connection region 158, in which the connection of the        electrical loads 104 to the monitoring-and-control units 138        takes place and which is adjacent to the functional region 156;    -   a cabling region 160, in which all of the connection cables 139        are arranged and which is adjacent to the connection region 158;        and    -   a heat management region 162, the role of which is specified        below.

In practice, the functional region 156 and the connection region 158 arelocated at the front of the connection column 110, i.e. in the vicinityof the face F1 of the enclosure, and the cabling region 160 occupies theentire width of the connection column, which corresponds to the width ofthe enclosure 100, i.e. from its front face F1 to its back face F2.

In practice, the heat management region 162 is located at the back ofthe connection column 110, in the vicinity of the back face F2, andextends, lengthwise, i.e. along the X-axis, from the electricaldistributing column 108 up to the cabling region 160.

As a variant, the functional column 111 does not comprise a cablingregion 160 and all of the connection cables 139 are arranged in theconnection region 158.

It is understood that the interior arrangement of the left-handconnection column 110 and the interior arrangement of the right-handconnection column 110 are symmetrical in relation to a plane of symmetryP2 parallel to the vertical plane formed by the Y- and Z-axes andpassing through the centre of the electrical distributing column 108.

The functional region 156 extends over a height H2 shorter than theheight H1, which makes it possible to install the communication module134 above the functional region 156, like in the example shown in FIGS.1 to 3, or below this region.

When a connection column 110 comprises the maximum number ofmonitoring-and-control units 138, for example thirty units in theexample shown, then these monitoring-and-control units occupy most ofthe functional region 156.

When a connection column 110 does not comprise the maximum number ofmonitoring-and-control units 138, the functional region 156 is not fullyoccupied by monitoring-and-control units and comprises a free space. Insuch a configuration, the communication module 134 may also be installedin the free space of the functional region 156.

In the example shown, the height H2 is 1500 mm; it could be different asa variant.

The connection region 158 extends over a height H3 shorter than theheight H1 and greater than the height H2. In practice, the height H3 isequal to the sum of the height H2 and of the height of the communicationmodule 134. Additionally, the height of the computer bus 142 is equal tothe height H3.

In the example shown, the height H3 is 1600 mm.

The cabling 160 and heat management 162 regions extend over the entireheight H1 of the functional column 111. In practice, the horizontal duct119 therefore passes through the cabling region 160.

Additionally, the horizontal duct 119 preferably passes above or belowthe functional 156 and connection 158 regions, so as not to pass throughthe heat management region 162.

In this configuration, the connection of the connection cables 139 tothe monitoring-and-control units 138 takes place via the front face F1of the enclosure 100.

Preferably, in this configuration, the width of the functional column111, and therefore of the enclosure 100, denoted by “l1”, is 600 mm. Thewidth of the cabling region 160 is therefore also 600 mm. In addition,the width of the functional regions 156 and of the connection regions158, denoted by “l2”, is preferably 400 mm. In such a configuration, thewidth of the heat management region 162, denoted by “l3”, is therefore200 mm.

FIG. 4 illustrates the interior arrangement of a second embodiment of anenclosure 100 with a functional column 111. This second embodimentdiffers from the embodiment of FIGS. 1 to 3 in that the width l1 of thefunctional column 111 is equal to the width l2 and in that theconnection columns 110 do not comprise a heat management region 162. Thearrangement of the functional 156, connection 158 and cabling 160regions is identical to the arrangement of these regions in the firstconfiguration of the functional column 111, apart from the width of thecabling region 160, which is equal to the width l2. As a variant, thefunctional column 111 of the second embodiment does not comprise acabling region 160 and all of the connection cables 139 are arranged inthe connection region 158.

FIG. 5 illustrates the interior arrangement of a third embodiment of anenclosure 100 with a functional column 111. This third embodimentdiffers from the embodiment of FIGS. 1 to 3 in that the connection ofthe connection cables 139 to the monitoring-and-control units 138 takesplace via the back face F2 of the enclosure 100. Thus, the functionalcolumn 111 does not comprise a dedicated cabling region 160 and theconnections are made in the heat management region 162. The widths l1,l2 and n are the same as in the embodiment of FIGS. 1 to 3.

As apparent from the comparison of FIGS. 3 to 5, the interiorarrangement of a functional column 111 is adaptable, which confersgreater modularity on the electrical enclosure 100.

In particular, the arrangement of a functional column 111 makes itpossible to choose to connect the connection cables 139 either via thefront of the enclosure 100, or via the back of the enclosure 100.

Preferably, in an enclosure 100, the width of all of the functionalcolumns 111 is equal either to l1, or to l2, and the width of the powersupply column 106 is chosen to be equal to the width of the functionalcolumns.

As a variant, it is possible that, in an electrical enclosure 100, somefunctional columns 111 have a width equal to l1 and other functionalcolumns have a width equal to l2.

The internal communication cables 136 are preferably positioned,depending on the height of the enclosure 100, opposite the horizontalset of busbars 118 in order to avoid any electromagnetic interference.In practice, this means that, preferably, the cables 136 are positionedat the top of the enclosure 100 when the horizontal duct 119 is locatedat the bottom of the enclosure and these cables are positioned at thebottom of the enclosure when this horizontal duct is located at the topof the enclosure.

As a variant, when the width l1 of a connection column 110 is equal to600 mm, the internal communication cables 136 may be positioned as closeas possible to the back face F2 of the enclosure 100, therefore of theconnection column 110, so as to pass through the heat management region162. In such a configuration, the cables 136 are sufficiently far fromthe horizontal set of busbars 118 to avoid any electromagneticinterference, even when the cables and the set of busbars are positionedat the top, or at the bottom, of the connection column.

Preferably, as can be seen in FIG. 3, the length L1 of a power supplycolumn 106 is 650 mm, the length L2 of an electrical distributing column108 is 150 mm, the length L4 of a cabling region 160 is 300 mm and thelength L5 of a functional region 156 and of a connection region 158 is650 mm. Thus, the length L3 is 950 mm.

Thus, the length L111 of a functional column 111 comprising twoconnection columns 110 is, preferably, equal to 2650 mm in aconfiguration in which each connection column comprises a cablingregion. As a variant, when no connection column comprises a cablingregion 160, the length L5 is equal to the length L3 and the length L111of a functional column 111 is, preferably, equal to 2050 mm.

As a variant, the lengths L1, L2, L3, L4, L5 and L111 are different.

The enclosure 100 comprises in practice a framework 164 and claddingsheets 166.

In the example shown, the framework 164 comprises a plurality of frames168 and cross members 170, the cross members 170 connecting the framesto one another and each frame being formed by four bars 172.

Among the four bars 172 of a frame 168, two are arranged along theY-axis and two are arranged along the Z-axis, so as to form a rectangle.Thus, each frame 168 is a rectangle parallel to the plane formed by theY- and Z-axes.

The cross members 170 extend along the X-axis and make it possible tojoin the frames 168 to one another. Advantageously, the cross members170 are arranged at the top end and at the bottom end of the enclosure100 and thus form top and bottom strips, respectively, which isaesthetically pleasing.

The cladding sheets 166 are attached to the framework 164 so as to closethe front F1, back F2, upper F4, left F5 and right F6 faces of theenclosure 100. Thus, the interior of the enclosure 100 is protected.

In the example of FIG. 1, the enclosure 100 does not comprise anycladding sheets 166 over the entire front face F1 of the connectioncolumns 110 of the enclosure 100, such that one face of eachcommunication module 134, of each monitoring-and-control unit 138 and ofeach protection unit 140 is accessible from the exterior. As a variant,the communication modules and the protection and connection units areprotected by cladding sheets 166.

Each cladding sheet 166 may additionally be a door, which allows accessto the interior of the enclosure 100. The cladding sheets 166 may beopaque or transparent. FIG. 1 shows the case in which the claddingsheets 166 located at the level of the power supply column 106 and ofthe cabling regions 160 are opaque.

Additionally, when the enclosure 100 has a width l1 of 600 mm, theframework 164 also comprises reinforcements 174, which extend from theback face F2 of the enclosure over a distance of 200 mm. Thus, thereinforcements 174 extend over the entire width of the heat managementregion 162, up to the interface between this heat management region andthe functional 156 and connection 158 regions.

In practice, each column—power supply, electrical distribution andconnection column—of the enclosure 100 comprises an independentframework and the frameworks of two adjacent columns are connected toone another, for example using screws, which allows great modularity inthe design and in the assembly of an enclosure 100.

As a variant, each functional column 111 comprises a framework 164common to the electrical distributing column 108 and to the one or moreconnection columns 110 of this functional column 111.

As a variant, the design of the framework 164 of the enclosure 100 isdifferent, for example the frames 168 form rectangles parallel to theplane formed by the X- and Z-axes and the cross members 170 extend alongthe Y-axis.

The detail of a communication module 134 is visible in FIGS. 6 and 7.

The communication module 134 comprises a front face 176 and a back face178.

In the example shown, between the front face 176 and the back face 178,the communication module extends over a width l134 of 400 mm.

When the communication module is installed on the connection column 110,the front face 176 of the module is at the level of the front face F1 ofthe column and of the enclosure and the back face 178 of the module iseither at the level of the back face of the enclosure, when theenclosure has a width l2 of 400 mm like in the embodiment of FIG. 4, orat the level of the reinforcements 174, when the enclosure 100 has awidth l1 of 600 mm, like in the embodiments of FIGS. 1 to 3 and 5.

A front ventilation grille 180 and two locks 182, just one of which isvisible in FIG. 6, are made on the front face 176. The locks 182 arearranged symmetrically in relation to a median plane 7134 of the drawer134 and make it possible to keep the communication module 134 installedin the connection column 110 by cooperating with the framework 164. Theyare actuable from the exterior of the enclosure 100, via its front faceF1.

A back ventilation grille 184 is made on the back face 178. When theenclosure 100 has a width l2 of 400 mm like in the embodiment of FIG. 4,the ventilation grille 184 connects the interior of the communicationmodule to the exterior of the enclosure. When the enclosure 100 has awidth n of 600 mm like in the embodiments of FIGS. 1 to 3 and 5, theventilation grille 184 connects the interior of the communication moduleto the heat management region 162.

By virtue of the front 180 and back 184 ventilation grilles, the airinside the communication module 134 is continually replenished bynatural convection, which makes it possible to cool the communicationmodule and to maintain a temperature inside this module that iscompatible with its operation, by removing the heat produced by theelectronic components contained in the communication module, and inparticular by the power supply blocks 150.

In practice, the air enters via the front ventilation grille 180, isheated by the electronic components of the communication module, whichmakes it possible to cool these components, and then exits via the backventilation grille 184.

As a variant, a fan is installed in the communication module 134 inorder to force the air to flow from the front to the back of the module.This fan is, for example, installed on the front ventilation grille, oron the back ventilation grille, or borne by a power supply block 150.

The front face 176 of the communication module 134 comprises indicators185 of the operation of the communication module, visible in FIG. 1.These indicators 185 are for example lights which signal the correctoperation of the power supply blocks 150 or a fault, i.e. aninterruption in the provision of the first auxiliary voltage.

Each connection column 110 comprises two lateral rails 186, attached tothe framework 164. The lateral rails 186 are shown in FIGS. 6 and 7.

The communication module 134 comprises two lateral faces 187, whichextend from the front face 176 to the back face 178. These lateral faces187 cooperate with the lateral rails 186 of the connection column 110,and make it possible to put the communication module 134 in place in theconnection column and to remove it by sliding it like a drawer, in adirection parallel to the Y-axis. The installation and the removal ofthe communication module 134 are therefore quick and easy.

The two power supply blocks 150 with redundancy are connected to acircuit board 188. In practice, the circuit board 188 comprises twoconnectors 189, onto which the power supply blocks 150 are plugged.

The circuit board 188 makes it possible to control the two power supplyblocks 150 and to manage the first auxiliary voltage.

The circuit board 188 is configured to, in the event of one of the twopower supply blocks 150 being faulty, warn of this failure, for exampleby means of an indicator 185, but continue to manage the first auxiliaryvoltage, delivered by the second, non-faulty power supply block.

The front face 176 of the communication module comprises a cover 190.This cover 190 is removable from the front face 176 and it is arrangedfacing the two power supply blocks 150. Thus, when the circuit board 188signals that a power supply block 150 is faulty, it is possible toremove the cover 190 to directly access the faulty power supply block,extract it from the communication module 134 and then replace it with afunctional power supply block. This replacement operation thereforetakes place without requiring the removal of the communication module134 from the connection column 110, which makes it possible to carry itout without interrupting the operation of the communication module, theother power supply block of which remains active. This replacement of apower supply block during operation is advantageous since it makes itpossible to avoid stopping the operation of the connection column 110.

Additionally, the circuit board 188 supplies first auxiliary voltage tothe managed switch 135 to allow the operation of this switch.

The circuit board 188 also supplies first auxiliary voltage to a firstconnector 192, arranged on a lateral face 187, which makes it possibleto connect the first auxiliary voltage to another column of theenclosure 100, for example to the first connector 192 of thecommunication module 134 of another connection column 110. Thus, in theevent of failure of both power supply blocks 150, a communication module134 is still supplied with first auxiliary voltage by the communicationmodule 134 of another connection column.

As a variant, this connection also makes it possible to avoid installinga power supply block 150 in every communication module 134 of anenclosure 100.

Additionally, the first connector 192 supplies first auxiliary voltageto the computer bus 142.

The circuit board 188 comprises a computing unit 193 which executessoftware making it possible to control the managed switch 135 and thepower supply blocks 150. In practice, the circuit board 188 and themanaged switch 135 are connected by an internal communication cable (notshown), for example an Ethernet cable.

The power supply blocks 150 are themselves supplied with the secondauxiliary voltage. The second auxiliary voltage therefore makes itpossible to supply the power supply blocks 150 and the electrical loads104 with power.

The communication module 134 comprises a protection housing 194, whichis for example a circuit breaker. The protection housing 194 suppliesthe communication module 134 with second auxiliary voltage. For that,the protection housing 194 is itself supplied with power by beingconnected to a power source external or internal to the electricalenclosure 100.

In practice, the housing 194 is connected to a second connector 196,arranged on the same lateral face 187 as the first connector 192, whichmakes it possible to connect the protection housing to the external orinternal power source.

As a variant, the protection housing 194 is connected to one verticalbusbar 124 of the set of vertical busbars 122 and to a neutral. Byconnecting to just one vertical busbar of a set of busbars and to aneutral, the housing 194 is supplied with power at a voltage lower thanthe voltage delivered by the main electrical power supply. For example,when the main electrical power supply is a three-phase power supplywhich delivers a voltage of 400 V, the auxiliary voltage obtained byconnecting to one phase and to a neutral is 230 V.

Advantageously, the protection housing 194 also supplies the computerbus 142 with second auxiliary voltage.

The lateral face 187 which bears the first and second connectors alsocomprises two communication connectors 198 connected to the managedswitch 135. Of these two communication connectors 198, a first connectorallows the connection of an internal communication cable 136 connectedto the communication module of another connection column 110, in thecase that the enclosure 100 comprises a plurality of connection columns110, and a second connector allows the connection of an internalcommunication cable 136 connected to the central switch 137. As avariant, the first and the second connectors are each connected to acommunication module of another connection column 110, so as to connectthree connection columns to one another. As a variant, the communicationmodule 134 comprises a number of communication connectors 198 other thantwo, for example one or three.

Openings are made in the lateral rails 186, so as to allow access to theconnectors 192, 196 and 198 when the communication module is installedon the lateral rails.

A connection column 110 may be configured for a plurality of differentuses:

A first configuration in which the connection column allows connectionto electric motors, such as for example three-phase motors. Eachelectric motor is connected to a monitoring-and-control unit. Theconnection column 110 then makes it possible to supply power to theseelectric motors and to drive them. In this first configuration, theconnection column 110 is then called “motor start-up column”.

A second configuration in which the connection column allows connectionto downstream electrical distribution circuits, such as for exampleelectrical switchboards or electrical distribution enclosures. Theconnection column 110 then makes it possible to distribute the powerfrom the power supply cables 102 to a plurality of downstream circuits,each downstream circuit being connected to a monitoring-and-controlunit, and to protect these downstream circuits. In this secondconfiguration, the connection column 110 is then called “currentdistribution column”.

A third configuration in which the connection column allows connectionto drivable electrical loads, such as for example photovoltaic panels orbatteries. Each electrical load is connected to a monitoring-and-controlunit 138. The connection column 110 then makes it possible to supplypower to these electrical circuits and to drive them. In this thirdconfiguration, the connection column 110C is then called “load drivingcolumn”.

In practice, the configuration and the architecture of the functionalregion 156, and more particularly of the monitoring-and-control units138, differ between the three configurations listed above. Additionally,other configurations associated with other uses are conceivable.

The following disclosure details the configuration and the architectureof a motor start-up column 110.

Certain elements mentioned below are described in the context of themotor start-up column, but their application is not limited exclusivelyto their use in a motor start-up column. Thus, certain elementsintroduced below could also be applied to elements used in a currentdistribution column or in a load driving column, for example.

Thus, the following description details the configuration and thearchitecture of a motor start-up module 200.

The configuration and the architecture of this module are transposableto other configurations, such as for example in the case of a currentdistribution column, where the motor start-up module then corresponds toa distribution module which makes it possible to distribute an electriccurrent to one or more downstream circuits and to protect thesecircuits, or in the case of a load driving column, where the motorstart-up module then corresponds to a driving module which makes itpossible to supply power to electrical loads and to drive them. Otheruses are conceivable.

What is meant by “functional module” is any module whose architecture istransposable from the architecture described below of a motor start-upmodule 200, such as for example a distribution module or a drivingmodule.

The motor start-up column 110 comprises one or more motor start-upmodules 200, one of which is visible in FIGS. 8 and 9.

Each motor start-up module 200 of a motor start-up column 110 is mainlylocated in the functional region 156 and partially located in theconnection region 158 of this motor start-up column.

When a motor start-up column 110 comprises a plurality of motor start-upmodules 200, the motor start-up modules are juxtaposed vertically.

In practice, each motor start-up module 200 comprises a protection unit140 and at least one monitoring-and-control unit 138. Eachmonitoring-and-control unit 138 of a motor start-up module iselectrically protected by the protection unit 140 of this motor start-upmodule.

Additionally, each monitoring-and-control unit 138 is connected to theprotection unit 140 protecting this monitoring-and-control unit, so asto be able to communicate information on the operation of thismonitoring-and-control unit to this protection unit.

In the example shown, the monitoring-and-control units 138 are drawers,the height of which may take a plurality of defined values. Throughoutthe rest of the description, the monitoring-and-control units 138 aretherefore called “drawer 138”. A base height of a drawer is thereforedefined as a unit height, denoted by “U”. The height of a drawer may beequal to an integer multiple of this base height, up to a limit of sixtimes the unit height U.

Thus, a drawer 138 may occupy a height of 1U, 2U, 3U, 4U, 5U or 6U.

Preferably, the unit height U is equal to 50 mm. Thus, a drawer 138 ofheight 6U will have, in this example, a height of 300 mm.

Each motor start-up module 200 has a main height, denoted by “H4”, equalto 6U. In the example shown, the functional region 156 has a height H2of 1500 mm and may therefore comprise up to five motor start-up modules200.

Additionally, the width of a motor start-up module, measured along theY-axis, is equal to the width l2 of the functional region in which themodule is installed.

Each motor start-up module 200 is configured to accommodate anytechnically permissible combination of drawers, depending on the heightof these drawers. For example, a motor start-up module may accommodatesix drawers of height 1U, or three drawers of height 2U, or one drawerof height 6U.

As can be seen in FIGS. 8 and 9, each motor start-up module 200comprises the following elements:

-   -   a support structure 202;    -   a protection unit 140;    -   a segment of computer bus 204, which corresponds to a portion of        the computer bus 142;    -   at least one drawer 138, in practice between one and six drawers        138;    -   at least one input-output module 206, in practice the same        number of input-output modules 206 and drawers 138, i.e. between        one and six input-output modules; and    -   at least one external connection module 208, in practice the        same number of connection modules 208 and drawers 138, i.e.        between one and six external connection modules. Each external        connection module 208 is configured for an electrical load 104        to be connected thereto and to supply power to this electrical        load. In practice, in the case of a motor start-up module 200,        each load 104 is an electric motor.

In the example shown in FIG. 8, the motor start-up module 200 shownaccommodates one drawer of height 2U and one drawer of height 4U.

In the example shown in FIG. 9, the motor start-up module 200 shownaccommodates two drawers of height 1U and two drawers of height 2U.

Three main positions of the drawer 138 in the motor start-up module aredefined:

-   -   An operating position of the drawer, in which the drawer is        fully inserted into the motor start-up module 200. This position        corresponds to the normal operating position of the drawer 138,        i.e., on the one hand, the drawer 138 supplies electrical power        to an external connection module 208 and the electrical load 104        which is connected thereto, and on the other hand, the drawer        138 is connected to the communication module 134 and to the        protection unit 140. Both of the drawers of FIG. 8 and the three        lower drawers of FIG. 9 are shown in operating position.    -   A test position of the drawer, in which the drawer is partially        inserted into the motor start-up module 200. This position        corresponds to an intermediate position in which the drawer 138        is operating, i.e. the elements that it contains are supplied        with electrical power and it communicates but the drawer does        not supply power to any electrical load 104. The upper drawer of        height 1U is shown in test position in FIG. 9.    -   A disconnected position of the drawer, in which the drawer is        partially or completely out of the motor start-up module 200 and        in which the drawer is not supplied with electrical power and        does not supply power to any electrical load 104.

The drawer 138 is configured to be able to be moved between these threepositions.

As can be seen in FIG. 10, the support structure 202 of each motorstart-up module 200 comprises a back support 210 and a lateral support212.

The back 210 and lateral 212 supports make it possible, on the one hand,to attach the motor start-up module 200 to the motor start-up column 110and, on the other hand, to attach the segment of computer bus 204, theprotection unit 140, each drawer 138, each input-output module 206 andeach external connection module 208 to the motor start-up module 200.

In practice, each motor start-up module 200 is attached to the framework164 of the motor start-up column 110 to which the module belongs throughits support 202.

For that, the back support 210 is attached either to bars 172 of theframework 164 located on the back face of the enclosure, when theenclosure has a width l2 of 400 mm like in the embodiment of FIG. 4, orto the reinforcements 174 of the framework 164 when the enclosure has awidth l1 of 600 mm like in the embodiments of FIGS. 1 to 3 and 5. Thelateral support 212 is attached to bars 172 of the framework 164 locatedon the front face of the enclosure.

The attachment of the supports 210 and 212 to the framework 164preferably takes place using screws (not shown in the figures).

The supports 210 and 212 are preferably attached together using screws(not shown in the figures).

In the assembled configuration of the motor start-up module 200 on theenclosure 100, the back support 210 extends mainly parallel to the planeformed by the X- and Z-axes. It is overall rectangular in shape andcomprises ventilation orifices 214, in the example shown six ventilationorifices.

The back support 210 comprises a set of attachment holes 216 which makeit possible to attach the back support 210 both to the framework 164 andto the elements of the motor start-up module 200 such as for example theprotection unit 140 or the external connection modules 208.

The lateral support 212 extends mainly parallel to the plane formed bythe Y- and Z-axes, in the assembled configuration of the motor start-upmodule 200 on the enclosure 100. It is overall rectangular in shape.

The lateral support 212 is configured to be attached, on the one hand,to a first end, to the back support 210 and, on the other hand, to asecond end, to the framework 164 of the enclosure 100. The lateralsupport 212 comprises a set of attachment holes 218 which allow thisinstallation, which preferably takes place using screws (not shown).

The lateral support 212 comprises openings 220, located close to theback support 210, i.e. close to the back of the motor start-up module.These openings are configured to allow the passage of the externalconnection modules 208, as can be seen in FIG. 8. In practice, thelateral support 212 comprises six openings 220.

The lateral support 212 comprises, in addition, windows 222, the role ofwhich is explained below. In practice, the support comprises six windows222.

The back 210 and lateral 212 supports are, in the example shown, formedby folded and pierced metal sheets.

The support structure 202 comprises, in addition, rails 224, in practicesix rails 224, which extend along the Y-axis. The rails 224 are,preferably, attached to the lateral support 212 by screws (not shown).

Each rail 224 comprises two windows 226, juxtaposed along the Y-axis.When a rail is attached to the lateral support 212, its two windows 226face a window 222 of the lateral support 212, as can be seen in FIGS. 8and 10.

In FIG. 10, two rails 224, namely the upper rail and the lower rail, areshown in exploded view, i.e. these two rails are shown uninstalled fromthe lateral support 212. The other intermediate rails are shown inposition on the lateral support 212.

Each rail 224 has a “U” shape, with a bottom 228 parallel to the planeformed by the Y- and Z-axes in which the windows 226 are made, and twoedges 230 which extend perpendicular to the bottom 228. The two edges230 are therefore opposite one another.

Additionally, the edges 230 of each rail 224 comprise a tongue 232,which extends in the direction of the opposite edge of the rail. Thetongues 232 of a rail are made in its edges 230 at the level of thewindows 226 of this rail closest to the back support 210, more preciselyat an end of this window closest to the back support 210.

A protection unit 140 is shown in perspective in FIGS. 11 and 12.

This protection unit contains the one or more protection members (notshown), such as for example a circuit breaker, which protect the one ormore drawers 138 of the motor start-up module 200.

The protection unit 140 comprises a front face 234, a back face 236, aninterior face 238 and an exterior face 240.

In practice, in installed configuration, the front face 234 of theprotection unit is contained in the same plane as the front face F1 ofthe enclosure 100.

In practice, the front and back faces 234 and 236 are parallel to theplane formed by the X- and Z-axes and the interior and exterior faces238 and 240 are parallel to the plane formed by the Y- and Z-axes.

The back face 236 of the protection unit 140 is attached to the backsupport 210 of the structure 202 of the motor start-up module 200, forexample using screws (not shown), which pass through the attachmentholes 216 in the back support.

When the protection unit 140 is attached to the structure 202, theinterior face 238 of the protection unit and the lateral support 212 ofthe structure 202 are facing, i.e. they are arranged facing one another.A volume V1 is defined as the volume located between the interior face238 of the protection unit, the back support 210 and the lateral support212.

The electrical connection of the protection unit 140 to the vertical setof busbars 122 takes place using electrical connectors 244, arranged onthe exterior face 240 of the protection unit, as can be seen in FIG. 12.Each connector 244 is connected to a vertical busbar 124 of the verticalset of busbars 122. In practice, the protection unit 140 comprises fourelectrical connectors 244, which makes it possible to connect, forexample, a power supply comprising three phases and a neutral.Additionally, it is possible not to connect some electrical connectors244, for example if the power supply of the electrical enclosure 100comprises three phases without neutral, or one phase and a neutral.

The protection unit 140 comprises a plurality of electrical outputgroups 246. These electrical output groups extend from the back face 236of the protection unit, in the direction of its front face 234. In otherwords, the electrical output groups 246 are arranged in the volume V1.

In practice, the protection unit 140 comprises six electrical outputgroups 246. The protection unit 140 may therefore protect up to sixdrawers 138.

The protection unit 140 therefore makes it possible to pool theprotection of the drawers 138 of a motor start-up module 200. Thispooling is advantageous since it makes it possible to decrease the costof the motor start-up module, each drawer 138 not requiring a dedicatedprotection unit.

Additionally, it is advantageous for the protection unit 140 not to beintegrated into the drawers 138. Specifically, in the event of failureof a drawer, only this drawer has to be replaced and the protection unit140 does not have to be replaced, which is less costly.

Each group of electrical outputs 246 comprises four electrical outputs248, each connected to one of the four electrical connectors 244.

The protection member of the protection unit 140 is therefore arrangedbetween the electrical connectors 244 and the electrical outputs 248.

This protection member is therefore connected, for each phase and theneutral, as input to a connector 244 and as output to six electricaloutputs 248, i.e. to one of the four electrical outputs of each group ofelectrical outputs.

A group of electrical outputs 246 is contained in a volume of heightequal to 1U. The protection unit 140 comprises rails 250, preferably sixrails 250, which are identical to the rails 224 of the support structure202. In particular, the rails 250 comprise windows 252 and tongues 254.

The rails 250 are arranged on the interior face 238 of the protectionunit.

In FIG. 11, the upper and lower rails 250 are shown in exploded view,i.e. these rails are uninstalled from the protection unit 140. The otherintermediate rails 250 are shown in position on the protection unit 140.

The rails 250 face the rails 224 of the support structure 202, i.e. eachrail 250 extends parallel to, and in the same horizontal plane as, arail 224. Thus, a rail 250 and a rail 224 together form a pair of rails.

As described below, a pair of rails formed of a rail 250 and of a rail224 makes it possible to move a drawer 138 between its operatingposition, its test position and its disconnected position.

Additionally, the interior face 238 of the protection unit 140 compriseswindows 256, in practice six windows 256, which are located facing thewindows 252 of the rails 250.

A drawer 138 of height 4U is shown in FIGS. 13 and 14.

This drawer 138 of height 4U comprises a frontal portion 300.

As can be seen in FIG. 13, the frontal portion 300 of the drawer extendsmainly parallel to the plane formed by the axes X and Z.

All of the drawers 138 comprise a frontal portion 300, which isdifferent depending on the height of the drawer. Thus, the height of thefrontal portion is matched to the height of the drawer of this frontalportion. A frontal portion 300 may therefore have a height of 1U, 2U,3U, 4U, 5U or 6U.

Throughout the rest of the description, any element described withreference to the drawer 138 of height 4U of FIGS. 13 and 14 is alsopresent in drawers 138 of a different height, unless explicitlymentioned otherwise.

The frontal portion 300 comprises a display 302, which displaysinformation on the operation of the drawer 138. This information is, forexample, the reference of the electrical load 104 controlled by thedrawer 138, the electrical power delivered to this electrical load, orthe state of this electrical load.

As a variant, the display 302 further comprises a strip oflight-emitting diodes, or “LEDs”, which comprises one or more LEDs ableto emit visual indicators in the form of colours.

The frontal portion 300 comprises a main handle 304.

The handle 304 comprises a base 306 and a grip extension 308.

In practice, the base 306 and the grip extension 308 are formed of apart formed as one piece, joined to the frontal portion by fasteningmeans 309 such as screws.

The base 306 comprises a button 310. The button 310 makes it possible totransmit a command to open the electromagnetic lock 311 arranged on oneside of the drawer 138, as can be seen in FIGS. 13 and 14 where theelectromagnetic lock 311 is on the side of the rail 250 of theprotection unit 140.

As a variant, the electromagnetic lock 311 is arranged on another sideof the drawer 138, as can be seen in FIGS. 15 and 16, where theelectromagnetic lock 311 is on the side of the rail 224 of the supportstructure 202. As a variant, two electromagnetic locks 311 are arrangedon the drawer 138, each on one side.

As a variant (not shown) of the invention, the button 310 is arranged inanother location on the frontal portion 300 of the drawer 138.

This electromagnetic lock 311 is mobile between a position for lockingthe drawer 138 and a position for unlocking the drawer 138.

In the position for locking the drawer 138, the electromagnetic lock 311makes it possible to keep the drawer 138 either in operating position,or in test position. In other words, the electromagnetic lock preventsthe insertion of the drawer into the motor start-up module 200 from itstest position to its operating position and prevents it from exiting themotor start-up module from its operating position or from its testposition.

In the position for unlocking the drawer 138, the electromagnetic lockallows the drawer to be freely inserted into the motor start-up modulefrom its test position to its operating position, or taken out of themotor start-up module from its operating position or from its testposition.

In practice, in the position for locking the drawer 138, theelectromagnetic lock 311 extends out of the drawer and mechanicallyblocks its insertion into the motor start-up module or its removal fromthe motor start-up module, as detailed below.

By default, the electromagnetic lock 311 is in the position for lockingthe drawer 138 and the lock moves into the position for unlocking thedrawer when it receives an opening command. In the absence of an openingcommand, the lock moves into the position for locking the drawer bydefault.

In the example, the button 310 has to be depressed into the base 306 totransmit an opening command and a spring (not shown) keeps the buttonnot depressed.

In other words, to insert the drawer 138 into the motor start-up modulefrom its test position to its operating position, or to remove thedrawer 138 from the motor start-up module from its operating position,it is necessary to actuate the button 310. Thus, the button 310 makes itpossible, when it is actuated, to send an opening command controllingthe unlocking of the electromagnetic lock 311 and thus to allow themovement of the drawer from its operating position or from its testposition.

In practice, the electromagnetic lock 311 controlled by the button 310prevents the insertion of the drawer 138 from its test position to itsoperating position, or the removal of the drawer 138 from its operatingposition, by interfering with the rail 224 or with the rail 250.

In FIGS. 36 and 37, the drawer 138 is shown locked by theelectromagnetic lock 311 in test position and in operating position,respectively. In this example, the electromagnetic lock 311 is shown onthe side of the rail 224 of the support structure 202.

The description below of the operation of the electromagnetic lock 311applies identically to an electromagnetic lock arranged on the side of arail 250 and interfering with this rail 250 to prevent the movement ofthe drawer 138.

As can be seen in these FIGS. 36 and 37, the electromagnetic lock 311comprises a rocker lever 3111 and a bolt 3113 arranged at a first end3115 of the rocker lever 3111. The rocker lever is rotatably mobileabout a second end 3117. Thus, when the electromagnetic lock 311receives an opening command, the rocker lever 3111 is rotatably drivenso as to move the bolt 3113.

In the position for locking the electromagnetic lock 311, the bolt 3113is arranged in a slot 2241 in the rail 224, when the drawer 138 is intest position, or in another slot 2243 in the same rail 224, when thedrawer is in operating position.

Thus, the movement of the drawer 138 is blocked by the contact of thebolt 3113 with the edge of the slot 2241 or the edge of the slot 2243 ofthe rail 224 of the support structure 202.

The rotation of the rocker lever 3111 is driven by an electromagneticactuator (not shown). This electromagnetic actuator is activated whenthe electromagnetic lock 311 receives an opening command. In practice,the actuation of the button 310 generates an opening command, which isan electrical signal, which controls the activation of the actuator ofthe electromagnetic lock 311.

As a variant (not shown) of the invention, the electromagnetic lock 311does not comprise a rotatably mobile rocker lever and the bolt 3113 istranslatably driven by an electromagnetic actuator, for example via aslide.

The base 306 comprises a slider 312, accessible through a window 314 inthe base 306.

The slider 312 is actuable between a position for locking the button 310and a position for unlocking the button 310.

In the position for locking the button 310, the slider 312 mechanicallyprevents the button 310 from being actuated. In other words, in thisposition, it is not possible to send an opening command to theelectromagnetic lock 311 and, therefore, it is not possible to move thedrawer 138 from its operating position or from its test position in themotor start-up module 200.

The position of the slider 312 in which the button 310 is prevented frombeing actuated by the slider therefore corresponds to a position forlocking the drawer 138.

In FIG. 13, the slider 312 is shown in the position for locking thebutton 310. In practice, the slider 312 may be translated along theX-axis with respect to the base 306 and the position for locking theslider is obtained when the slider is to the right of the window 314 inthe base.

The grip extension 308 of the handle is configured to be easily grippedby hand and thus facilitate the movement of the drawer 138 within themotor start-up module 200, parallel to the Y-axis.

Additionally, the grip extension 308 comprises an open-ended hole 316.The hole 316 is configured to allow a locking device 318 to be put inplace in the main handle 304.

Locking devices 318 are shown in FIGS. 8 and 9, and are, in the example,padlocks.

In practice, the open-ended hole 316 is configured to allow a pluralityof locking devices 318 to be put in place therein, for example theshanks of three locking devices.

The slider 312 is securely attached to a shank 810 visible in FIG. 40,which extends inside the main handle 304 of the drawer 138.

The shank 810 comprises a first free end 812 and a second free end 814.

The first end 812 of the shank 810 is securely connected to a supportplate 816, which is driven in motion by the slider 312. Thus, the slider312 transmits a translational motion to the shank 810 via the supportplate 816.

In practice, the support plate 816 is arranged in the base 306 of thehandle 304, and is translatably mobile in the base 306 along an axisparallel to the X-axis of the drawer 138.

The free end 814 of the shank 810 is configured so as, in the positionfor locking the button 310, not to extend into the open-ended hole 316and, in the position for unlocking the button 310, to extend into theopen-ended hole 316.

Thus, when the locking device 318 is in place in the open-ended hole316, the slider 312 cannot be actuated into the position for unlockingthe button 310, since the end 814 of the shank 810 is prevented fromextending into the open-ended hole 316 by the locking device 318, in theexample by the shackle of a padlock.

In addition, the shank 810 comprises a cut-out 818. When the slider 312is in the position for unlocking the button 310, the cut-out 818 islocated facing the button 310 and does not prevent the activation of thebutton. Conversely, when the slider 312 is in the position for lockingthe button 310, the cut-out 818 is offset, along the X-axis, in relationto the button 310, and the body of the shank 810 then prevents thebutton from being actuated.

In other words, when the slider 312 is in the position for locking thedrawer 138 and potentially when a locking device 318 is in place in theopen-ended hole 316, the button 310 cannot be actuated.

In summary, when the slider 312 is in the position for locking thebutton 310, it is possible to put a locking device 318 in place in thehole 316 in the handle 304, which makes it possible to prevent thetranslation of the slider 312 into the position for unlocking the button310. This makes it possible to block the actuation of the button 310 andtherefore the sending of a command to unlock the drawer 138 via theelectromagnetic lock 311.

The support plate 816, which is secured to, and actuated by, the slider312 is additionally connected to a mechanical lock 820, visible in FIGS.36 to 40. In FIGS. 36 and 37, the rail 224 is partially hidden, in orderto make visible a portion of the mechanism of the mechanical lock 820.

In the example shown in these figures, the mechanical lock 820 is shownon the side of a rail 224. The description below of the operation of themechanical lock 820 applies identically to a mechanical lock arranged onthe side of a rail 250 and interfering with this rail 250 to prevent themovement of the drawer 138.

The mechanical lock 820 is complementary to the electromagnetic lock 311and these locks together form a locking system for the drawer 138.

Preferably, the mechanical lock 820 is made of a metal material, forexample of steel.

The mechanical lock 820 comprises a structure 822, which is attached tothe drawer 138. This structure 822 extends mainly parallel to theY-axis, i.e. parallel to the axis of movement of the drawer 138 in themotor start-up module 200.

Additionally, when the drawer 138 is installed in the motor start-upmodule 200, the structure 822 is accommodated in the rail 224.

The structure 822 comprises a tongue 824 in the shape of a boss which isin contact with the rail 224 and thus makes it possible to maintainelectrical continuity between the structure 822 and the rail 224, whenthe drawer is installed in the motor start-up module. In particular,this electrical continuity makes it possible for the drawer 138 to havea common ground with the motor start-up module 200.

The mechanical lock 820 comprises a shank 826, which extends mainlyparallel to the Y-axis and which is translatably mobile along this axiswith respect to the structure 822.

The shank 826 comprises a first end 828, a main body 829 and a secondend 830.

The second end 830 is thin in relation to the main body 829, i.e. thedimension of the second end 830, measured along an axis parallel to theZ-axis of the drawer 138, is smaller than the dimension of the main body829. In other words, the second end 830 is narrower than the main body829.

The first end 828 is connected to an actuating lever 832, by a pivotlink 834, of axis Z834 parallel to the Z-axis of the drawer 138. Thus,the actuating lever 832 is rotatably mobile with respect to the shank826.

Additionally, the actuating lever 832 is also connected to the structure822, by a pivot link 836, of axis Z836 parallel to the Z-axis of thedrawer 138. Thus, the actuating lever 832 is rotatably mobile withrespect to structure 822. In practice, the axis Z836 represents the axisof rotation of the actuating lever 832 in relation to the drawer 138,because the structure 822 is fixed in relation to the drawer 138.

In addition, a guide rail 838 is made in the actuating lever 832. Theguide rail 838 has a bent shape, i.e. it comprises two rectilinearportions that are oblique with respect to one another, denoted by 840and 842, respectively.

A pin 844, attached to the support plate 816, is arranged in the guiderail 838. More precisely, the pin 844 is arranged at the end of a leg845 which is formed as one piece with the support plate 816 and isfolded at right angles with respect to this support. Thus, the pin 844is mobile and its movement is driven by the slider 312.

When the slider 312 is in the position for locking the button 310, thepin 844 is arranged in the portion 840 of the guide rail 838, as shownin FIG. 38.

When the slider 312 is in the position for unlocking the button 310, thepin 844 is arranged in the portion 842 of the guide rail 838, as shownin FIG. 39.

The movement of the slider 312 from its locking position to itsunlocking position drives a rotation of the actuating lever 832 aboutthe axis Z836, due to the translation of the pin 844 along an axisparallel to the X-axis of the drawer.

Specifically, the pin 844 moves only in translation, since it isattached to the support plate 816 by the leg 845. This translation takesplace without movement of the actuating lever 832 when the pin 844 islocated in the first portion 840 of the guide rail 838. Next, the pin844 forces the rotation of the actuating lever 832 about the pivot 836as soon as it engages in the second portion 842 of the guide rail 838,by exerting a force on the lateral walls of the guide rail.

The rotation of the actuating lever 832, under the action of the pin844, drives a movement of the pivot 834, which then gets closer, alongan axis parallel to the Y-axis of the drawer 138, to the support plate816.

This movement of the pivot 834 then drives a movement of the shank 826,also along an axis parallel to the Y-axis of the drawer 138 and in thedirection of the support plate 816.

Thus, the actuating lever 832 makes it possible to convert atranslational motion of the slider 312 along an axis parallel to theX-axis of the drawer 138 into a translational motion of the shank 826along an axis parallel to the Y-axis of the drawer, i.e. in a directionperpendicular to the direction of the translation of the slider 312.

Preferably, the connection between the shank 826 and the actuating lever832 comprises a set of operations, along an axis parallel to the X-axisof the drawer 138 (not visible in the figures), which facilitates theconversion of the rotation of the actuating lever into the translationof the shank.

The second end 830 of the shank 826 cooperates with two latches 850,which belong to the mechanical lock 820. Each latch 850 comprises a mainbody 852, pivotably mounted about a pivot 854, the axis of rotation X854of which is parallel to the X-axis of the drawer 138, and a hook 856.

Each latch 850 is mobile between a position for locking the drawer 138,shown in FIGS. 36 and 38, and a position for unlocking the drawer 138,shown in FIGS. 37 and 39.

When the latches 850 are in the position for locking the drawer 138,their hook 856 extends into a notch 2245 in the rail 224. This positionis visible in FIG. 36.

In this position, the drawer 138 is in test position and cannot be movedinto its operating position or into its disconnected position, since thehooks 856 butt against the walls of the notches 2245 in the rail 224.

When the latches 850 are in the position for unlocking the drawer 138,as can be seen in FIG. 37, the hooks 856 do not extend into the notches2245 and do not prevent the movement of the drawer 138 in the motorstart-up module.

As can be seen in FIGS. 38 and 39, the structure 822 also comprises twoguide notches 857. Each notch 857 is configured to guide a hook 856,i.e. a hook 856 extends through a notch 857, when the latches 850 are inthe position for locking the drawer 138 and when the latches are in theposition for unlocking the drawer.

By virtue of the guide notches 857, the movement of the hooks 856 isguided so as to facilitate their insertion into the notches 2245 in therail 224 when the latches 850 move into the position for locking thedrawer 138.

By default, the latches 850 are in the position for unlocking the drawer138.

Specifically, the mechanical lock 820 further comprises an elasticmember 858, which keeps the latches 850 in the position for unlockingthe drawer 138.

In the example shown, this elastic member 858 is an elasticallydeformable tongue, for example made of spring steel.

This elastically deformable tongue is overall in the shape of a U, witharms that converge with distance from its bottom. It extends around thepivots 854 and its two ends are each held by an end 860 of the main body852 of a latch 850.

As a variant (not shown) of the invention, the elastic member 858 is atension spring, for example a helical spring, which extends between thetwo ends 860 of the main bodies 852 of the two latches, along an axisparallel to the Z-axis of the drawer 138.

Each latch 850 further comprises a cam 862 which is oriented towards theother latch 850. Thus, the two cams 862 are located facing one another.

When the slider 312 is in the position for unlocking the button 310, thelatches 850 are in the position for unlocking the drawer 138.

Specifically, when the slider 312 is in the position for unlocking thebutton 310, the second end 830 of the shank 826 is located between thecams 862 of the latches 850. Since this second end 830 is thin, the cams862 are close to one another and the hooks 856 are sufficiently far fromthe rail 224 so as not to extend into the notches 2245 in the rail.

Conversely, when the slider 312 is in the position for locking thebutton 310, the latches 850 are in the position for locking the drawer138.

Specifically, when the slider 312 is in the position for locking thebutton 310, the shank 826 is moved such that the main body 829 of theshank is located between the cams 862 of the latches 850, as can be seenin FIG. 36. Thus, the latches 850 are moved apart from one another andthe hooks 856 extend into the notches 2245 in the rail 224.

In other words, when the slider 312 goes from its position for unlockingto its position for locking the button 310, the shank 826 of themechanical lock 820 moves so as to push on the cams 862 and thus movethe hooks 856 apart into the notches 2245 in the rail 224 until thelatches 850 reach their position for locking the drawer 138. Themovement of the slider 312 therefore makes it possible to move the hooks856.

The notches 2245 in the rail 224 are made in a specific location, suchthat the hooks 856 may extend therein only when the drawer 138 is intest position. The mechanical lock 820 therefore makes it possible tolock the drawer 138 in test position.

Thus, the mechanical lock 820 is mobile between two positions: aposition for locking the drawer 138, in which the drawer is in testposition, and a position for unlocking the drawer 138, in which themechanical lock 820 does not prevent the movement of the drawer 138.

Additionally, when the slider 312 is in the position for locking thebutton 310, then the mechanical lock 820 is in the position for lockingthe drawer 138, and when the slider 312 is in the position for unlockingthe button 310, then the mechanical lock 820 is in the position forunlocking the drawer 138.

Thus, when the slider 312 is in the position for locking the button 310,it is possible to mechanically block the movement of the drawer 138 inthe motor start-up module 200, by virtue of the mechanical lock 820.

Additionally, in this position of the slider 312, a locking device maybe put in place in the hole 316 in the handle, which then prevents thepassage of the slider into the position for unlocking the button 310 andtherefore the passage of the mechanical lock 820 into the position forunlocking the drawer 138.

In summary, the slider 312 makes it possible to actuate the mechanicallock 820.

The locking system for the drawer 138 thus comprises two distinctlocking mechanisms, i.e. the electromagnetic lock 311 and the mechanicallock 820.

It is understood that the slider 312 interacts with these two lockingmechanisms, since, depending on its position, the slider 312 allows orprevents the activation of the button 310, which controls theelectromagnetic lock 311, and moves the mechanical lock 820 between itspositions for locking or for unlocking the drawer 138.

In summary, the electromagnetic lock 311 makes it possible to lock thedrawer 138 either in operating position, or in test position, and themechanical lock 820 makes it possible to lock the drawer 138 in testposition.

Additionally, the electromagnetic lock 311 may be unlocked only when themechanical lock 820 is unlocked.

The locking of the position of the drawer 138 in test position then hasredundancy, which is particularly advantageous for making the use of thedrawer 138 and of the electrical load 104 to which it is connected safe.

Specifically, during maintenance operations on the electrical load 104connected to a drawer 138, it is desirable for the drawer 138 to besupplied with electrical power but for the electrical load 104 not to besupplied with electrical power, which corresponds to the test positionof the drawer. In this position of the drawer, it is then possible tooperate on the electrical load 104 connected to the drawer without risk,because the electrical load 104 is not being supplied with electricalpower.

To ensure the safety of a maintenance operator operating on theelectrical load 104, it is necessary to ensure that the drawer 138cannot be moved from its test position into its operating position. Forthat, the maintenance operator puts a locking device 318, such as apadlock, in place on the drawer 138, which prevents the movement of thedrawer 138. This operation is referred to as “electrical lockout” of theelectrical load 104, since it is not possible to re-establish the supplyof electrical power to the electrical load 104 as long as the lockingdevice 318 is installed.

The locking device 318 thus prevents the unlocking of the drawer 138.

Because the through-hole 316 is configured to be able to accommodate aplurality of locking devices 318, a plurality of maintenance operatorsmay prevent the unlocking of the drawer 138 by each installing a lockingdevice 318.

Having locking redundancy is then safer, since in the event of failureof one of the two locks, the movement of the drawer 138 into operatingposition remains impossible.

Additionally, the electromagnetic lock 311 and the mechanical lock 820both operate independently of the elements contained in the drawer 138.Thus, the locking system described above is usable for many types ofmonitoring-and-control drawer, regardless of the functions that thesedrawers comprise.

As a variant, the drawer 138 further comprises a manually operatedmechanism making it possible to unlock the electromagnetic lock 311 inthe absence of voltage, so as to allow the movement of the drawer fromits operating position into its test position, or from its test positioninto its disconnected position.

As a variant, the drawer 138 does not comprise a mechanical lock 820 andthe locking system for the drawer is then formed only of theelectromagnetic lock 311.

As a variant, the button 310 is replaced with another control devicesuch as, for example, a touchscreen or a handle.

As a variant, the electromagnetic lock 311 is controlled by a deviceother than the button 310, in particular by a remote device. In such avariant, the commands to open the electromagnetic lock 311 are, forexample, sent by a remote computer, which may be the computer 130, or,for example, by the communication module 134.

The frontal portion 300 of the drawer 138 further comprises a secondaryhandle 320.

The secondary handle 320 comprises a base 322 and a grip extension 324.

The grip extension 324 of the secondary handle is identical to the gripextension 308 of the main handle 304.

The base 322 of the secondary handle 320 differs from the base 306 ofthe main handle in that the base 322 does not comprise a button, or aslider.

In practice, only the drawers 138 with a height of 4U, 5U and 6Ucomprise a secondary handle 320. The drawers with a height of 1U, 2U and3U comprise only the main handle 304.

The main handle 304 has a height equal to 1U, in order to be able to beinstalled on a drawer of height 1U.

The frontal portion 300 comprises ventilation grilles 326. Theventilation grilles are in practice perforations made in a region of thefrontal portion which allow the flow of air between the exterior of thedrawer 138 and the interior of the drawer.

Each ventilation grille 326 has a height equal to 1U.

In practice, the frontal portion of a drawer with a height N×U, with Nan integer between 1 and 6, comprises N ventilation grilles. Forexample, the frontal portion 326 of the drawer of height 4U of FIGS. 13and 14 comprises four ventilation grilles 326 and the frontal portion ofthe drawer of height 2U visible in FIG. 8 comprises two ventilationgrilles 326.

The drawer 138 comprises a base 328, which has a height equal to 1U anda cover 330.

The base 328 is the main structure of the drawer. The frontal portion ofthe drawer is attached to the base 328 and the drawer is installed andsecured in the motor start-up module 200 by the base 328.

In practice, the electromagnetic lock 311 is arranged in the base 328 ofthe drawer.

The base 328 is horizontal and the elements contained in the drawer,which are detailed below, are attached thereto.

In the example shown in FIGS. 8, 9, 13 and 14, the base 328 is locatedat the bottom of the drawer 138.

The cover 330 is a protection structure, which makes it possible toclose the drawer 138 and to protect the elements contained in thedrawer. In practice, the shape of the cover 330 is dependent on theheight of the drawer 138. Thus, each drawer height has a correspondingcover height.

When the drawer 138 has a height equal to 1U, the cover 330 is formed bya planar and horizontal plate 332. Such an example is visible in FIG. 9.In such an example, it is considered that the height of the cover 330 is0×U.

As can be seen in FIGS. 13 and 14, when the drawer 138 has a heightgreater than 1U, the cover 330 comprises a horizontal planar plate 332,two lateral walls 334 which extend from two opposite edges of the planarplate towards the base 328 and which are parallel to a plane formed bythe Y- and Z-axes, and a back wall 336 which extends from an edge of theplanar plate opposite the frontal portion 300 of the drawer towards thebase 328 and which is parallel to a plane formed by the X- and Z-axes.In such a configuration, the height of the cover 330 is 1U shorter thanthe height of the drawer 138.

Thus, the height of the cover 330 is between 0U and 5U.

In practice, in the example of FIGS. 13 and 14 which corresponds to adrawer of height 4U, the cover 330 has a height equal to 3U. Thus, whenit is positioned on the base 328, the cover 330 extends from the base tothe top of the drawer 138, i.e. the planar plate 332 of the cover 330 isat the level of the upper edge of the frontal portion 300.

In the case of a drawer with a height equal to 2U or 3U, the back wall336 of the cover 330 comprises one ventilation orifice 338.

In the case of a drawer with a height equal to 4U, 5U, or 6U, the backwall 336 of the cover 330 comprises two ventilation orifices 338.

As a variant, the back wall 336 of the cover of a drawer of height 6Ucomprises three ventilation orifices 338.

In FIGS. 15 and 16, a drawer 138 of height equal to 1U is shown withoutits cover 330 which is the same as that shown in FIG. 9.

In FIG. 15, it is possible to see the frontal portion 300 of the drawer138, the slider 312 of which is in the position for unlocking the button310, i.e. the slider is to the left of the window 314 in the base 306and the button 310 may be actuated to unlock the drawer 138 from themotor start-up module 200.

The base 328 comprises a support plate 340. The support plate 340 is inthe shape of a “U”, i.e. it comprises a main portion 342, which ishorizontal, and which is in practice the bottom of the drawer 138, andtwo vertical walls 344, which extend parallel to the plane formed by theY- and Z-axes.

The base 328 comprises, in addition, two lateral structures 346. Thelateral structures 346 are attached on the exterior of the verticalwalls 344 of the support plate 340 by fastening means such as forexample screws 347. In practice, the lateral structures 346 extend fromthe frontal portion 300 of the drawer 138 along the Y-axis to the backof the drawer, i.e. to a back portion 348 of the drawer opposite itsfrontal portion, this back portion 348 of the drawer also belonging tothe base 328 of the drawer 138.

The lateral structures 346 therefore belong to the base 328 of thedrawer 138.

In practice, the structure 822 of the mechanical lock 820 is secured toa lateral structure 346.

Each lateral structure 346 comprises rollers 350, preferably two rollers350.

The rollers 350 each have an axis X350 parallel to the X-axis and areconfigured to roll in the rails 224 of the structure 202 of the motorstart-up module and in the rails 250 of the protection unit 140. Thus,the diameter of the rollers 350 is smaller than the separation betweenthe two edges of the rails 224 and 250.

In practice, each drawer 138 is installed in the volume V1 in the motorstart-up module 200. For that, a first lateral structure 346 is insertedinto a first rail of the rails 224 and 250 and a second lateralstructure 346 is inserted in a second rail of the rails 224 and 250 ofthe same pair of rails, and then the rolling of the rollers 350 on therails makes it possible to insert the drawer into the motor start-upmodule and to remove it therefrom.

Thus, the drawer 138 is mobile in the motor start-up module between thethree main positions of the drawer, by virtue of the lateral structures346.

Each lateral structure 346 further comprises a mobile lateral contact352, which makes it possible to connect the drawer 138 to acommunication interface 353 which belongs either to the input-outputmodule 206 or to the protection unit 140 and the operation of which isexplained below.

The back portion 348 of the drawer 138 extends between the two lateralstructures 346.

In the case of a drawer of height 1U, the cover 330 extends from thefrontal portion 300 to the back portion 348 and between the two lateralstructures 346.

In the case of a drawer of height greater than or equal to 2U, thelateral walls 334 of the cover 330 extend up to the vertical walls 344and the back wall 336 of the cover extends up to the back portion 348.

The back portion 348 comprises a group of upstream connectors 354, agroup of downstream connectors 356 and a ventilation orifice 358.

The upstream 354 and downstream 356 connectors are therefore installedon the base 328 of the drawer 138.

As can be seen more clearly in FIG. 16, the ventilation orifice 358 islocated between the group of upstream connectors 354 and the group ofdownstream connectors 356, along the longitudinal X-axis of the drawer138. Advantageously, the ventilation orifice 358 is centred with respectto the base 328, along the X-axis. In addition, the groups of upstream354 and downstream 356 connectors are arranged symmetrically on eitherside of the ventilation orifice 358.

When a drawer is installed in the motor start-up module 200, theventilation orifice 358 is located facing a ventilation orifice 214 ofthe back support 210.

In practice, the back portion 348 comprises four upstream connectors 354and four downstream connectors 356.

When the drawer 138 is in operating position, the upstream connectors354 are fitted onto the four electrical outputs 248 of a group ofelectrical outputs 246 of the protection unit 140. Thus, the drawer 138is supplied with electrical power from an electrical power supply line,via the protection unit 140. In other words, the protection unit 140 isa source of electricity for the drawer 138.

When the drawer 138 is in operating position, the downstream connectors356 are fitted onto an external connection module 208. Thus, the drawer138 supplies electrical power to an external connection module 208 andmakes it possible to supply power to an electrical load 104 when such aload is connected to the external connection module 208.

When the drawer 138 is in test position or in disconnected position, theupstream 354 and downstream 356 connectors are unplugged from theelectrical outputs 248 of the protection unit 140 and of the externalconnection module 208, respectively.

The drawer 138 comprises functional elements 362, which are not shown indetail but the location of which is marked by dashed lines in FIG. 17.In a known manner, these functional elements 362 make it possible tocontrol the electrical load 104, in practice an electric motor, andallow the operation of the drawer 138.

These functional elements comprise in particular:

-   -   at least one contactor;    -   a thermal protection relay, for example a bimetallic        electromechanical relay or an electronic relay, which has the        role of protecting the electric motor supplied with power by the        drawer 138 from potential overloads which may occur in        particular on starting up the motor;    -   sensors for the operation of the drawer 138, such as for example        sensors for the voltage of the electrical power supply from the        upstream connectors 354; and    -   electronic components configured to collect signals from sensors        for the operation of the electrical load 104, arranged on, or        close to, the electrical load 104, such as for example        temperature probes or speed sensors.

In practice, the contactor is directly connected to the upstreamconnectors 354 by connection busbars 360 and to the downstreamconnectors 356 by downstream connection busbars 361. In practice, oneconnection busbar 360 or 361 is provided per connector 354 or 356. InFIGS. 15 and 16, just three connection busbars are shown for the sake ofsimplicity, namely those of the phases of the current.

Thus, the contactor may, in a known manner, selectively interrupt orallow the flow of an electric current between the upstream connectors354 and the downstream connectors 356. By virtue of the contactor, it ispossible to supply electrical power to the electrical load 104, whichmakes it possible for example to start up and then to run an electricmotor when the flow of a current is allowed, and to stop the operationof such a motor when the current is interrupted.

Additionally, the drawer 138 may contain a plurality of contactors,which makes it possible for example to control the voltage delivered tothe electrical load 104 in order to control, for example, the rotationalspeed of a motor; or to control the direction of rotation of a motor.

The drawer 138 also comprises a control circuit board 364. The controlcircuit board is attached to support plate 340.

The control circuit board 364 is connected to the communication module134 of the motor start-up column 110. It makes it possible to controlthe functional elements 362 of the drawer 138, such as the contactor,the thermal protection relay, the display 302 according to the commandsfrom the communication module. It also makes it possible to grouptogether the information from the sensors for the operation of thedrawer and the information from the electronic components configured tocollect signals from the sensors for the operation of the electricalload, before analysing it and transmitting it to the communicationmodule 134.

According to this analysis of the information from the sensors for theoperation of the drawer and of the electrical load, the control circuitboard 364 may adapt its control of the functional elements 362, forexample by giving the contactor the order to interrupt the supply ofpower to the electrical load when an operation sensor returns amalfunction in the electrical load.

Thus, by virtue of the functional elements 362 and of the circuit board364, each drawer 138 supplies power to an electrical load 104, controlsthis electrical load and monitors this electrical load. Each drawer 138therefore simultaneously has a role of supplying power to, ofcontrolling and of monitoring an electrical load 104.

The control circuit board 364, the functional elements 362 and theelectromagnetic lock 311 of the drawer are supplied with first auxiliaryvoltage.

The electromagnetic lock 311 is in practice controlled by the controlcircuit board 364 and the button 310 communicates with the controlcircuit board.

When the button 310 is actuated, it sends a control signal to thecontrol circuit board 364, requesting the activation of theelectromagnetic lock 311 so as to move into the position for unlockingthe drawer 138.

In this case, the control circuit board 364 performs verificationoperations, after receiving the signal from the button 310 and beforemoving the electromagnetic lock into the position for unlocking thedrawer.

These verification operations consist, for example, in analysing theinformation from the sensors for the operation of the drawer and fromthe sensors for the operation of the electrical load 104, so as to movethe electromagnetic lock 311 into the position for unlocking the draweronly if the operating states of the drawer, for example of thefunctional elements 362, and/or of the electrical load are satisfactory.

The control circuit board is configured so that if, during theseverification operations, a fault in the drawer 138, for example in oneof the functional elements 362, or in the electrical load 104, forexample in one of the sensors for the operation of the electrical load,is detected, then the lock 311 is not moved into the position forunlocking the drawer and so that, preferably, a message informing ofthis fault is displayed on the display 302.

Thus, by virtue of the electromagnetic lock 311, the opening of which iscontrolled by the button 310 and validated by the control circuit board364, the drawer 138 may be unlocked, i.e. moved from its test positionor from its operating position, only after validation of the correctoperating state of the drawer 138 and/or of the electrical load 104.

This validation prior to unlocking the drawer 138 is particularlyadvantageous, since it makes it possible to make the use of theelectrical enclosure 100 and of the electrical load 104 safe by ensuringthe correct operation of the drawer and of the electrical load beforetheir connection.

The choice of the height of a drawer 138—i.e. from 1U to 6U—is dependenton the power that has to be delivered to the electrical load 104.Specifically, the higher the power consumed by the electrical load 104,the larger the dimensions of the contactor and of the other functionalelements.

Thus, a contactor controlling a motor of low power, for example up to 11kW, will be relatively small and could be installed in a drawer ofheight 1U, whereas a contactor controlling a motor of high power, forexample 75 kW, will be larger and will have to be installed in a drawerof height 6U. A contactor controlling a motor of intermediate power, forexample 30 kW, will be for example installed in a drawer of height 3U.

The design of the drawers 138 described here is advantageous, since thebase 328, which constitutes the main structure of the drawer allowingits installation in the motor start-up module and which bears all of theelectrical connectors—upstream and front connectors, lateralcontacts—and the functional elements 362 of the drawer 138, is common tothe six heights of the drawer 138.

By virtue of the frontal portion 300 and of the cover 330, the heightsof which are adapted to the dimensions of the functional elements 362,the drawer 138 is modular.

Thus, it is straightforward to adapt the height of a drawer 138 to thedimensions of a contactor and of the other functional elements, sinceonly the frontal portion 300 and the cover 330 differ between drawers138 of different height.

The functional elements 362 of a drawer 138 heat up during theiroperation, in particular the contactor and the thermal protection relay.The heat thus produced heats the air contained in the drawer 138, whichthen has to be replenished in order to maintain an interior temperaturecompatible with the normal operating conditions of the functionalelements of the drawer.

An air flow FL1 flowing through a drawer 138 is shown in FIG. 17.

In this figure, the siting of the functional elements 362 of the drawer138 is shown with dashed lines. It is observed that the air flow FL1flows at the level of these functional elements, which allows theircooling by heat exchange. In practice, when the air flow FL1 flows atthe level of these functional elements, the air flow cools thefunctional elements while heating up itself.

The amount of heat produced by the functional elements 362 of the drawerdepends in particular on the electrical power of the motor 104controlled by this drawer. In the case of an electric motor of lowpower, for example up to 11 kW, the heat produced will be removed fromthe drawer 138 of height 1U controlling this motor by the air flow FL1which is caused by natural convection.

This natural convection occurs by virtue of the ventilation grille 326of the frontal portion 300 of the drawer 1U and of the ventilationorifice 358 of the back portion 348 of the drawer.

In practice, the air flow FL1 enters via the ventilation grille 326 andexits via the ventilation orifice 358.

In the case of an electric motor of higher power, for example of between11 kW and 75 kW, the drawer 138 controlling this motor will have aheight of between 2U and 6U, depending on the power of the motor. Insuch a configuration, the air flow FL1 allowing the cooling of thedrawer enters via the ventilation grilles 326 of the frontal portion 300and exits on the one hand via the ventilation orifice 358 of the backportion 348 and on the other hand via the one or more ventilationorifices 338 of the back wall 336 of the cover 330.

In other words, the ventilation orifice 358 of the back portion 348 andthe one or more ventilation orifices 338 of the back wall 336 of thecover 330 together form a back ventilation region 359 of the drawer 138.The back ventilation region of the drawer is therefore located at thelevel of the back portion 348 of the drawer.

In the case of a drawer 138 of height 1U, the back ventilation region359 of the drawer is akin to the ventilation orifice 358 of the backportion 348 of the drawer.

In practice, in the case of a drawer with a height of between 2U and 6U,the drawer 138 comprises one or more fans 366 to force the air flow FL1to flow through the drawer 138.

Each fan 366 is arranged on the back wall 336 of the cover and has aheight slightly shorter than 2U. The fans 366 are configured to expelthe air contained in the drawer 138 out of the drawer.

When the drawer 138 has a height equal to 2U or to 3U, it comprises onefan 366. This fan is arranged between the ventilation orifice 358 of theback portion 348 of the drawer and the ventilation orifice 338 of thecover 330. In other words, this fan is arranged on the back ventilationregion 359 of the drawer.

When the drawer 138 has a height equal to 4U, as can be seen in FIG. 14,5U or 6U, it comprises two fans 366, which are superposed, a first ofwhich is arranged between the ventilation orifice 358 of the backportion 348 of the drawer and a first ventilation orifice 338 of thecover and a second of which is arranged entirely on a second ventilationorifice 338 of the cover. In other words, these two fans are arranged onthe back ventilation region 359 of the drawer.

When the drawer 138 has a height equal to 6U, it optionally comprises athird fan 366 arranged on a third ventilation orifice 338.

By virtue of the one or more fans 366, the replenishment of the air inthe drawer 138 is improved and the cooling of the functional elements ismore effective.

Advantageously, the control circuit board 364 controls the one or morefans 366 to optimize their operation.

Advantageously, the control circuit board 364 is configured to stop thefans 366 when the functional elements of the drawer 138 are notgenerating any heat, in particular when the electrical load 104 is notbeing supplied with electrical power.

According to another advantageous approach, the drawer 138 comprises atemperature sensor measuring the temperature inside the drawer 138 andthe rotational speed of the fans 366 is adapted according to thetemperature inside the drawer 138, i.e. the rotational speed increaseswhen the temperature is high in order to accelerate the replenishment ofair and decreases when the temperature inside the drawer issatisfactory.

Advantageously, the drawer 138 comprises one or more radiators 368, oneof which is shown in FIG. 17, which are arranged on one or morefunctional elements 362 and which make it possible to increase theexchange of heat with the air flow FL1 flowing through the drawer 138,thereby improving the cooling of these functional elements.

In this case, advantageously, the drawer 138 comprises deflectors 370which concentrate the air flow FL1 onto these radiators 368. Inpractice, the deflectors 370 are for example sheets which direct the airflow along its journey through the drawer. The presence of deflectors inthe drawer 138 results in modifying the flow of the air through thedrawer 138, without modifying its main direction, i.e. from the frontalportion 300 to the back ventilation region 359.

The fact that the air enters into the drawer 138 via its frontal portion300 and exits therefrom via its back ventilation region 359 isadvantageous. Specifically, these two portions are arranged at two endsof the drawer, along the Y-axis, and the air flow flowing through thedrawer then flows directly between these two ends along the Y-axis, i.e.it does not undergo any significant change in direction, which is moreeffective than an air flow in which the air inlet and the air outlet arelocated on the same face, for example the frontal face. Specifically,any variation in the direction of flow of an air flow slows this airflow.

In other words, the air flow FL1 goes through the drawer from one sideto the other without significant change in direction. What is meant by“without significant change” is that the air flow FL1 does not followany curve having an angular amplitude greater than 30°, preferablygreater than 15°.

In practice, the air flow FL1 is disrupted when it comes into contactwith the functional elements 362, but these disruptions do notconstitute a change in the main direction of the air flow and arenecessary to provide heat exchange between the air and the functionalelements.

Furthermore, the total height of the ventilation grilles 326 of thefrontal portion 300 is substantially equal to the height of the backventilation region 359 of the drawer 138. In other words, the backventilation region 359 of the drawer and the ventilation grilles 326 ofa drawer 138 extend over the entire height of the drawer, whatever theheight of the drawer. Thus, the air flow FL1 goes through the drawer 138from one side to the other without change in vertical direction, i.e.the air flow FL1 is horizontal.

By virtue of this heat management based on an air flow through thedrawer 138 from one side to the other, the cooling of the functionalelements of the drawer 138 is improved.

Additionally, this heat management based on an air flow through anelement from one side to the other also makes it possible to cool thecommunication module 134.

Specifically, the communication module 134 comprises a front ventilationgrille 180, on its front face 176, and a back ventilation grille 184, onits back face 178, which have a role analogous, respectively, to theventilation grilles 326 of the frontal portion 300 of the drawers 138and to the ventilation orifice 358 of the back portion 348 of thedrawers 138.

The back ventilation grille 184 therefore has a role analogous to theback ventilation region 359 of the drawer 138.

The communication module 134 is therefore also passed through from oneside to the other by an air flow FL1, without significant change indirection.

This air flow makes it possible to cool the elements producing heat inthe communication module 134, in practice the one or more power supplyblocks 150 and the circuit board 188.

As a variant (not shown) of the invention, the communication module 134comprises, in addition, at least one fan installed in order to force theair flow FL1 through the communication module and arranged on the backventilation grille 184 and/or on the front ventilation grille 180.Preferably, these one or more fans are controlled by the circuit board188.

As a variant (not shown) of the invention, the communication module 134comprises, in addition, at least one radiator, arranged on the one ormore power supply blocks 150 or on the circuit board 188. Preferably,the communication module 134 further comprises at least one deflector,configured to direct the air flow FL1 towards the one or more radiators.

What is meant by “functional unit” is a unit which is either acommunication module 134, or a monitoring-and-control unit 138, in theexample a drawer 138, and which is cooled by the air flow FL1.

The drawer 138 has a width, measured along the Y-axis, equal to l2, i.e.400 mm. This width is measured between the frontal portion 300 and theback portion 348 of the drawer.

When the motor start-up module 200 is installed in an enclosure 100 ofwidth l2 equal to 400 mm like in the embodiment of FIG. 4, the backportion 348 of each drawer is located at the level of the back face F2of the enclosure 100. Additionally, the sheet 166 forming the back faceof the enclosure 100 comprises ventilation grilles 372, visible in FIG.4. These ventilation grilles are arranged facing the ventilation region359 of each drawer. Thus, the ventilation region 359 of a drawer 138connects the interior of this drawer to the exterior of the enclosure,through these ventilation grilles 372. In such a configuration, the airflowing through the drawer 138 exits directly out of the enclosure 100,via its back face.

When the motor start-up module 200 is installed in an enclosure 100 ofwidth l1 equal to 600 mm like in the embodiments of FIGS. 1 to 3 and 5,the back portion 348 of each drawer is located at the level of theinterface between the functional region 156, which comprises the motorstart-up module 200, and the heat management region 162. Thus, theventilation region 359 connects the interior of the drawer 138 to theheat management region 162 of the enclosure. In such a configuration,the airflow FL1 flowing through the drawer 138 exits into the heatmanagement region 162 of the enclosure.

In addition, in such a configuration, the air flowing through thecommunication module 134 also exits into the heat management region 162of the enclosure, via the back ventilation grille 184 of thecommunication module.

The heat management region 162 is an essentially empty column, whichextends over the entire height of the enclosure 100. Thus, the airexiting from drawers 138, heated by the functional elements 362 of thesedrawers, rises through convection to the top of the heat managementregion 162, the same as for the air exiting from the communicationmodule 134.

Additionally, the heat management region 162 comprises an upper face, atthe top of the enclosure 100, which is in practice a portion of theupper face F4 of the enclosure. This upper face comprises an escapegrille (not shown). This escape grille allows the hot air to exit fromthe heat management region 162. Thus, an air flow FL2 from the drawers138 and from the communication module 134 rises through the heatmanagement region 162 and exits via the top of the heat managementregion 162, i.e. via the upper face F4 of the enclosure 100, as shown inFIG. 2.

In other words, the heat management region 162 has the role of a chimneyfor the escape of the hot air from the drawers 138 and from thecommunication module 134.

Optionally, the upper face of the heat management region, whichcorresponds to the upper face F4 of the enclosure, comprises anextraction fan 374, which draws the air contained in the heat managementregion in order to expel it from the enclosure 100. By virtue of such afan, the removal of the hot air flow FL2 is facilitated. By virtue ofthe heat management region 162, which allows extraction of the hot airfrom all of the drawers 138, and from the communication module 134, viathe top of the enclosure 100, it is possible to install the enclosure100 such that its back face is obstructed, for example by positioningthe enclosure against a wall, or back-to-back with a second enclosure100, without negatively affecting the heat management of the drawers 138and of the communication module 134.

As a variant, the fans 366 are arranged on the ventilation grilles 326of the frontal portion of the drawer 138 and facilitate the entry of theair flow FL1 into the drawer.

As a variant, the fans 366 are arranged both on the ventilation grilles326 of the frontal portion of the drawer and on the back ventilationregion 359.

Additionally, when the enclosure 100 does not comprise a cabling region160, like in the embodiment of FIG. 5, the connection of the cables 139is performed in the heat management region 162, but the cables 139 arenot arranged in the air flow FL2 and therefore do not affect the coolingof the enclosure. Specifically, the cables are located at the back ofthe connection region 158 while the air flow FL2 is located at the backof the functional region 156.

As a variant, the heat management of a drawer 138 and of an enclosure100 comprising one or more drawers 138 described above is applied todrawers 138 installed in current distribution columns or load drivingcolumns.

As a variant, the heat management of a drawer 138 and of an enclosure100 comprising one or more drawers 138, described above and comprisingthe use of the grilles 326 and of the orifices 338 and 358, is appliedto monitoring-and-control units 138 which are fixed units of theenclosure.

FIG. 18 is a perspective view of a mobile lateral contact 352 of alateral structure 346. Each mobile lateral contact 352 is in practicearranged at the level of a window 400 made in the lateral structure 346and of a window 402 made in the vertical wall 344.

Each drawer 138 comprises two mobile lateral contacts 352, each arrangedin a lateral structure 346. Of these two mobile lateral contacts, afirst makes it possible to connect the drawer 138 to the communicationinterface 353 of the input-output module 206 and a second makes itpossible to connect the drawer 138 to a communication interface 353 ofthe protection unit 140. The design and the operation of these twomobile lateral contacts are identical.

As a variant, the drawer 138 comprises just one mobile lateral contact352, arranged in a lateral structure 346, which makes it possible toconnect the drawer 138 either to the communication interface 353 of aninput-output module 206, or to the communication interface 353 of theprotection unit 140.

In practice, each input-output module 206 comprises one communicationinterface 353 and the protection unit 140 comprises six communicationinterfaces 353, arranged in the windows 256.

Each mobile lateral contact 352 comprises a plate 404. The plate 404comprises a main body 406 which has a shape that is elongate along theY-axis and two wings 408 which extend perpendicular to the main body 406along the X-axis.

The main body 406 of the plate comprises an opening 410.

In practice, the main body 406 has a height along the Z-axis that isshorter than the height of the window 402 of the vertical wall 344.

As can be seen in FIG. 19, the plate 404 is arranged inside the drawer138, in contact with the face of the vertical wall 344 facing theinterior of the drawer 138.

The two wings 408 of the plate extend towards the exterior of the drawer138, are arranged in two slots 412 in the vertical wall 344 and extendbetween the vertical wall 344 and the lateral structure 346.

Each wing comprises an end edge 414, parallel to the Y-axis and achamfer 416, which connects the end edge 414 to the main body 406 of theplate 404.

The vertical wall 344 comprises two holding brackets 418, which arelocated facing the window 402 and formed by cutting out and folding thevertical wall 344. In practice, the holding brackets 418 comprise afirst portion which extends perpendicular to the vertical wall 344towards the interior of the drawer 138 and a second portion whichextends perpendicular to the first portion, i.e. parallel to thevertical wall 344, so as to extend facing the window 402.

The plate 404 is held in position in relation to the drawer 138 by thewings 408, arranged in the slots 412, by the brackets 418, which preventthe plate from translating towards the interior of the drawer 138 alongthe X-axis, and by the vertical wall 344, which prevents the plate fromtranslating towards the exterior of the drawer along the X-axis.

The plate 404 is fixed in relation to the drawer 138 along the Y-axis.

Additionally, a spring 420 is arranged between each bracket 418 and themain body 406 of the plate. The two springs 420 allow the plate 404 tobe held against the vertical wall 344.

Each mobile contact 352 also comprises a frame 422, arranged between thevertical wall 344 and the lateral structure 346.

In practice, the lateral structure 346 comprises a main wall 424 and twosecondary walls 426. The main wall 424 is parallel to the vertical wall344 of the support plate 340 and the two secondary walls 426 extend fromthe main wall 424 towards the vertical wall 344, as can be seen for oneof them in FIG. 15.

Thus, the lateral structure 346 defines an interior volume between themain 424 and secondary 426 walls and the vertical wall 344 of thesupport plate 340.

The frame 422 is arranged inside the interior volume of the lateralstructure 346 and is mobile in this interior volume, along the Y-axis.

In practice, the frame 422 is not mobile along the X-axis since it is incontact on the one hand with the vertical wall 344 and on the other handwith the main wall 424.

The height H422 of the frame 422 is shorter than the distance, measuredalong the Z-axis, which separates the two secondary walls 426 of thelateral structure 346.

The height of the frame 422 is greater than the height H400 of thewindow 400 in the lateral structure, such that the frame cannot exitfrom the interior volume of the lateral structure via the window 400.

As can be seen in FIG. 20, the frame 422 comprises two openings 428 ofheight H428 which go through the frame 422 along an axis parallel to theX-axis.

Each mobile lateral contact 352 also comprises a contact housing 430.The contact housing comprises a fixture 432 from which two contactholders 434 extend, on each side of the fixture 432, along the Y-axis.

The height of each contact holder 434, denoted by “H434”, is shorterthan the height H428 of the openings 428.

The height of the fixture 432, denoted by “H432”, is greater than theheight H428 of the openings 428.

The contact housing 430 is arranged in the interior volume of thelateral structure 346, between the frame 422 and the vertical wall 344,and extends partially out of this interior volume, along the X-axis,through the window 400. In practice, the frame 422 bears the contacthousing 430. Each contact holder 434 passes through an opening 428 inthe frame 422. In other words, the frame 422 guides the movement of thecontact housing 430 along the Y-axis in the lateral structure 346.

The contact housing 430 is mobile along the X-axis in the frame 422. Itstranslational motion along the X-axis is limited, on the one hand, bythe vertical wall 344 and, on the other hand, by the fixture 432 whichcomes into contact with the frame 422, as can be seen in FIGS. 21, 22and 23.

Each mobile lateral contact 352 comprises springs 435, in practice foursprings 435. The springs 435 are arranged between the contact housing430 and the frame 422 and are configured to exert a force whichdistances the contact housing 430 from the frame 422, along the X-axis.Since the frame 422 is not mobile along the X-axis, the force exerted bythe springs 435 results in the contact housing 430 being moved along theX-axis in relation to the drawer 138, towards the interior of thisdrawer.

Each mobile lateral contact 352 also comprises two electrical contacts436.

Each electrical contact 436 is arranged securely in a contact holder434.

The electrical contacts 436 each comprise flexible connectors 438.

The flexible connectors 438 are configured to be able to connect thedrawer 138 either to an input-output module 206, or to the protectionunit 140. This connection is described below.

Cables 440 are additionally connected to the control circuit board 364of the drawer 138. In FIGS. 18 to 23, the cables 440 are shown onlypartially.

In practice, the cables are connected to the flexible connectors 438 andextend from the back of the electrical contacts 436 through the window402 in the vertical wall 344 and through the opening 410 in the plate404, into the interior of the drawer 138.

Each mobile lateral contact 352 also comprises a guide shaft 442. Theguide shaft is preferably a cylinder which extends along the Z-axis andit is installed in the frame 422.

As a variant, the guide shaft is formed as one piece with the frame 422.

The height H442 of the guide shaft 442 is greater than the distance,measured along the Z-axis, which separates the secondary walls 426 ofthe lateral structure 346. Thus, the guide shaft 442 extends out of theinterior volume of the lateral structure 346, through two slots 444 madein the secondary walls 426.

Each mobile lateral contact 352 also comprises tension springs 446,preferably two springs 446. The tension springs 446 extend parallel tothe Y-axis. Each tension spring 446 is attached by one of its ends tothe guide shaft 442 and by the other of its ends to the lateralstructure 346.

Each mobile lateral contact 352 is configured to ensure connection ofthe flexible connectors 438 to a protection unit 140 or an input-outputmodule 206 for any position of the drawer 138 between its operatingposition and its test position and so that this connection is notinterrupted when the drawer 138 is moved between its test position andits operating position.

For that, each mobile lateral contact 352 is mobile along thelongitudinal axis A138 of the drawer 138, which is parallel to theY-axis, and along the transverse axis B138 of the drawer, which isparallel to the X-axis.

FIGS. 21, 22 and 23 illustrate three different positions of a lateralcontact 352.

An engagement position of the drawer 138 is defined as a positionlocated between the disconnected position and the test position of thedrawer. In FIG. 21, the drawer 138 is shown between its engagementposition and its test position. The test position of the drawer is shownin FIG. 22 and the operating position of the drawer is shown in FIG. 23.

In these figures, only the mobile lateral contact 352 and a portion ofthe drawer 138 are shown. In particular, the rails 224 and 250 intowhich the lateral structures of the drawer are inserted are hidden, forgreater clarity. In practice, the movement of each mobile lateralcontact is affected by the interaction of the mobile lateral contactwith the rail 224 or 250 into which the lateral structure 346 bearingthis mobile lateral contact is inserted.

When the drawer 138 is inserted into the motor start-up module 200between its disconnected position and its engagement position, themobile lateral contact 352 does not move in relation to the drawer 138.

In this position, the frame 422 and the guide shaft 442 are held by thetension springs 446 as close as possible to the back portion 348 of thedrawer, in a rest position. In practice, the frame 422 and the guideshaft 442 are as close as possible to the back portion of the drawer 348when the guide shaft 442 is in contact with an end of the slot 444. Thisposition is not shown in the figures.

In addition, in this position, the contact housing 430 and the contacts426 are in an inserted position in the drawer 138, i.e. the contacthousing 430 is away from the frame 422 and is closer to the verticalwall 344. In other words, in the inserted position, the contact housing430 and the contacts 426 are contained as far as possible in theinterior volume of the lateral structure 346 and extend as little aspossible out of this interior volume through the window 400.

In practice, the inserted position of the contact housing 430 and of thecontacts 426 is imposed by the springs 435 which exert on the contacthousing 430 a force separating it from the frame 422.

During the insertion of the drawer 138 into the motor start-up module200, when the drawer 138 reaches engagement position, the guide shaft442 comes into contact with the tongues 232 or 254 of the rails 224 or250.

Specifically, the height H442 of the guide shaft 442 is greater than thedistance, measured along the Z-axis, between the edges of the rails 224and 250 but is shorter than the distance between the tongues of therails.

From this engagement position, the translation of the frame 422, of thecontact housing 430 and of the electrical contacts 436 along the Y-axisis stopped. These elements then start to move in relation to the drawer138. Thus, between the engagement position of the drawer and theoperating position of the drawer, via the test position of the drawer,the frame 422 is translated with respect to the interior volume of thelateral structure 346. In practice, the frame 422 becomes fixed inrelation to the motor start-up module 200 while the drawer 138 is inmotion. During this motion of the drawer, the tension springs 446 arestretched.

The movement of the frame 422, of the housing of contact 430 and of theelectrical contacts 436 between the engagement position of the drawerand the test position of the drawer takes place in two phases.

During a first phase, the frame 422, the contact housing 430 and theelectrical contacts 436 move in relation to the drawer 138 along theY-axis and the axis B138, away from the rest position of the frame 422,while remaining fixed in relation to the motor start-up module 200. Thismovement takes place until the fixture 432 of the contact housing 430,which is fixed along the Y-axis, comes into contact with the end edge414 of the wing 408 of the plate 404, which is mobile along the Y-axis.This position is shown in FIG. 21.

During a second phase, after the fixture 432 has come into contact withthe end edge 414, the movement in relation to the drawer 138 of theframe 422 and of the elements that it bears along the Y-axis continuesand the contact housing 430 is additionally translated along the X-axisand the axis A138, away from the interior volume of the lateralstructure 346.

The translation of the contact housing 430 along the X-axis thereforetakes place by virtue of the chamfer 416 of the wing, which, during itstranslation along the Y-axis, pushes the contact housing and thecontacts 436 from their inserted position towards an exserted positionfrom the drawer 138, visible in FIG. 22. This motion leads tocompression of the springs 435 between the contact housing and the frame422.

Additionally, this translation of the contact housing 430 and of theelectrical contacts 436 along the X-axis is allowed since, from theengagement position to the operating position of the drawer 138, thecontact housing 430 of the mobile lateral contact 352 is located facingthe windows 226 or 252 in the rail into which the lateral structure isengaged.

In practice, each contact holder 434 of the contact housing 430 islocated facing one of the two windows 226 or 252 in the rail.

By virtue of this translation, the electrical contacts 436 extend out ofthe lateral structure 346 and may come into contact with the protectionunit 140 or an input-output module 206.

Between the test position of the drawer and the operating position ofthe drawer, the contact housing 430 is fixed along the X-axis inrelation to the motor start-up module 200 and the fixture 432 of thecontact housing slides on the end edge 414 of the wing 408 of the plate404.

In other words, the fixture 432 imposes the motion of the contacthousing 430 in relation to the drawer 138, towards its exsertedposition.

Additionally, the springs 420 which hold the plate 404 against thevertical wall 344, i.e. in a reference position, are configured so that,in the event that the exsertion of the contact housing 430 along theX-axis is blocked, for example by an obstacle present in the window inthe rail, the force exerted by the springs 420 is weaker than the forceexerted by the fixture 432 on the wing 408 of the plate 404, which thenresults in the plate 404 moving along the X-axis, towards the holdingbrackets 418, i.e. towards a safety position.

By virtue of this movement of the plate 404, in such a scenario, themobile lateral contact 352 is not damaged.

This movement of the plate 404 also makes it possible to accommodatevariations in the relative positioning of the parts. For example, if thecommunication interfaces 353 are closer to the drawers 138, the movementalong the X-axis of the plate will make it possible to avoid exertingexcessive stresses on the electrical contacts 436.

In summary, in relation to the motor start-up module 200, the movementof the electrical contacts 436 comprises three phases:

-   -   from the disconnected position to the engagement position of the        drawer, the electrical contacts 436 are in translation along the        Y-axis in a rail 224 or 250 in relation to the motor start-up        module and are fixed in relation to the drawer 138;    -   from the engagement position of the drawer to the test position        of the drawer, the electrical contacts 436 are in translation        along the X-axis away from the lateral structure 346, through        the windows 226 or 252 in the rail and are fixed along the        Y-axis in relation to the motor start-up module 200; and    -   from the test position of the drawer to the operating position        of the drawer, the electrical contacts 436 are fixed in relation        to the motor start-up module.

By virtue of this three-phase movement of the electrical contacts 436,and more particularly by virtue of the fact that the electrical contacts436 are fixed in relation to the motor start-up module 200 between thetest position and the operating position of the drawer, contact betweenthe electrical contacts 436 and the protection unit 140 or theinput-output module 206 is maintained without interruption, which makesit possible to maintain a connection between the control circuit board364 and the protection unit 140 or between the control circuit board 364and an input-output module 206 between these two positions.

When the electrical contacts 436 extend through the windows 226 in arail 224, they also extend through the windows 222 in the lateralsupport 210 to which the rail 224 is attached.

The cables 440 are flexible, such that their end connected to theelectrical contacts 436 is mobile with the electrical contacts 436. Inaddition, the dimensions of the window 402 of the vertical wall 344 andof the opening 410 of the plate 404 make it possible not to interferewith the movement of the cables 440.

When the drawer 138 is taken out of the volume V1 of the start-up module200, i.e. when it goes from its operating position to its disconnectedposition, the movement of the electrical contacts 436 of the mobilelateral contact 352 comprises three phases:

-   -   from the operating position to the test position of the drawer,        the electrical contacts 436 are fixed in relation to the motor        start-up module 200 and are in translation along the Y-axis in        relation to the drawer 138;    -   from the test position to the engagement position of the drawer,        the electrical contacts 436 are fixed along the Y-axis in        relation to the motor start-up module and are in translation        along the X-axis away from the frame 422 and towards the lateral        structure 346, under the effect of the springs 435; and    -   from the engagement position to the disconnected position of the        drawer, the electrical contacts 436 are in translation along the        Y-axis in relation to the motor start-up module and are fixed in        relation to the drawer 138.

As can be seen in FIG. 24, the input-output module 206 comprises ahousing 500 on which are arranged two connection pads 502, which formthe communication interface 353.

When the drawer 138 is in operating position or in test position, theflexible connectors 438 of the two electrical contacts 436 are incontact with the two connection pads 502. In practice, the connectors438 are said to be “flexible” since they may deform elastically alongthe X-axis under a force, for example under the force generated bycontact with the connection pads 502. This deformation makes it possibleto maintain good electrical contact between the flexible connectors andthe connection pads 502 since it makes it possible to tolerate errors inrelative alignment and in relative position of the connectors and of thepads.

As can be seen in FIG. 8, the housing 500 of the input-output module 206is attached to the lateral support 212 of the motor start-up module 200.Each input-output module 206 is associated with a drawer 138 and islocated, on the lateral support 212, at the height of the base 328 ofthis drawer.

The input-output module 206 also comprises a linear connector 504 whichmakes it possible to connect the input-output module 206 to the segmentof computer bus 204 of the motor start-up module 200. Thus, theinput-output module 206 is connected to the electronic circuits 144, tothe electrical power supply tracks 148 conducting the first auxiliaryvoltage and to the electrical power supply tracks 154 conducting thesecond auxiliary voltage.

The input-output module 206 comprises a first wireless communicationboard 506, arranged in the housing 500. This first wirelesscommunication board is not visible from the exterior of the housing 500and is shown with dashed lines in FIG. 24.

The first wireless communication board 506 communicates with a secondwireless communication board 508, which is in practice arranged in thedrawer 138 associated with the input-output module, as can be seen inFIG. 16 where the second board is also shown with dashed lines.

In practice, the first and second wireless communication boards arearranged facing one another, i.e. they are aligned along the same axisparallel to the transverse Y-axis of the electrical enclosure.

The first and second communication boards are configured to be able toexchange data by transmitting and receiving radiofrequencies, forexample by using a wireless protocol, preferably at a frequency of 60GHz. For example, the protocol used is the Ethernet protocol. Thisexchange of data therefore takes place remotely, without contact betweenthe communication boards.

Additionally, the first and second communication boards 506 and 508 areconfigured to allow this exchange of data when the drawer 138 is inoperating position, when the drawer is in test position, and when thedrawer moves between these two positions.

In the example, the contact between a mobile lateral contact 352 of adrawer and the two connection pads 502 of an input-output module makesit possible to deliver the first auxiliary voltage from the electricalpower supply tracks 148 to the drawer and the data exchanged between thefirst and second communication boards 506 and 508 correspond to the datawhich travel through the electronic circuits 144.

This solution is advantageous since it makes it possible to separate,into two different connections, the data exchanged on the one hand andthe transmission of a voltage on the other hand.

Additionally, because one of the two mobile lateral contacts 352 of adrawer 138 is connected to the input-output module from the testposition of the drawer to the operating position of the drawer, thefirst auxiliary voltage is delivered to the drawer from its testposition. Thus, the control circuit board 364 and the functionalelements 362 are supplied with first auxiliary voltage in the testposition of the drawer.

This power supply in test position is advantageous, since it makes itpossible, for example, to verify the correct operation of the drawer 138before allowing the movement of the drawer 138 into operating position.

As a variant, a first connection pad 502 of the two pads makes itpossible to deliver the first auxiliary voltage to the drawer 138 and asecond connection pad makes it possible to exchange data between thedrawer and the input-output module 206, in complement to or inredundancy with the exchange of data carried out by the communicationboards, such as for example emergency stop signals.

As a variant, the drawer 138 and the input-output module 206 do notcomprise communication boards and the data which travel through theelectronic circuits 144 are exchanged between the drawer 138 and theinput-output module via the connection pads 502 and a mobile lateralcontact 352.

As can be seen in FIG. 8, each input-output module 206 also comprisesconnection terminal blocks 510.

Among the connection terminal blocks 510 of an input-output module, someare connected on the one hand to the electrical power supply tracks 154and on the other hand to the electrical load 104 connected to the drawer138 associated with said input-output module, which makes it possible tosupply this electrical load with second auxiliary voltage. In practice,power supply cables (not shown) connect the connection terminal blocks510 to the electrical load 104.

As a variant, these power supply cables are connected to mobileconnectors and the mobile connectors are configured to be connected tothe connection terminal blocks 510.

Supplying an electrical load 104 with second auxiliary voltage makes itpossible to supply power to ancillary functions of the electrical load104. When the electrical load 104 is an electric motor, these ancillaryfunctions are, for example, heating circuits, which make it possible tokeep the electric motor above a minimum temperature when the motor isnot in operation. These heating circuits are advantageous since theymake it possible to prevent condensation effects which could damage thismotor.

Among the connection terminal blocks 510 of an input-output module,others are connected on the one hand to the electronic circuits 144 andon the other hand to sensors (not shown) arranged at the level of theelectrical load 104, such as for example position, speed or temperaturesensors when the load 104 is a motor, or an emergency stop button. Thedata from these sensors are transmitted on the one hand to the drawer138 and on the other hand to the segment of computer bus.

Thus, each input-output module 206 makes it possible to connect thesegment of computer bus 204 to a monitoring-and-control drawer 138 andto the electrical load 104 connected to this monitoring-and-controldrawer and allows the exchange of data between themonitoring-and-control drawer 138 and the electrical load 104.

This input-output module 206 is advantageous, since it makes it possibleto centralize a plurality of connections in a single housing and itmakes it possible to connect the drawer 138 to the segment of computerbus 204 without requiring the implementation of electrical cables.

As can be seen in FIG. 25, the segment of computer bus 204 comprises ahousing 600 in which a circuit board 602 is arranged.

Like the computer bus 142, the segment of computer bus 204 extendslengthwise along the Z-axis.

The circuit board 602 bears electronic circuits 604, first electricalpower supply tracks 606 and second electrical power supply tracks 608.

The segment of computer bus 204 also comprises linear connectors 610, inpractice six linear connectors.

Each linear connector 610 is connected to the electronic circuits 604and to the electrical power supply tracks 606 and 608.

In practice, the segment of computer bus 204 is configured to be able tobe connected to one or more input-output modules 206, up to sixinput-output modules. Each input-output module is connected to thesegment of computer bus by a linear connector 610. Specifically, thelinear connectors 610 are configured to be connected to the linearconnectors 504 of the input-output modules, thus ensuring a connectionbetween the segment of computer bus 204 and the input-output modules206.

In FIG. 8, two input-output modules 206 are connected to the segment ofcomputer bus.

The segment of computer bus 204 also comprises male connectors 612 at afirst end along the Z-axis, in the example at a top end. In practice,the male connectors 612 comprise a first connector 614 connected to thefirst electrical power supply tracks 606, a second connector 616connected to the second electrical power supply tracks 608 and a thirdconnector 618 connected to the electronic circuits 604.

This first end also comprises pins 620, in practice two pins 620, whichextend from the housing 600 along the Z-axis, away from the housing.

The segment of computer bus 204 also comprises female connectors 622 ata second end along the Z-axis, in the example at a bottom end. Inpractice, the female connectors 622 comprise a first connector 624connected to the first electrical power supply tracks 606, a secondconnector 626 connected to the second electrical power supply tracks 608and a third connector 628 connected to the electronic circuits 604.

The male connectors 612 and the female connectors 622 have complementaryshapes, i.e. the male connectors may slot into the female connectors.

This second end also comprises cavities 630. The pins 620 and thecavities 630 have complementary shapes, i.e. the pins may slot into thecavities.

The female connectors 622 and the cavities 630 are visible in detail inFIG. 26.

By virtue of the pins 620 and of the cavities 630, a plurality ofsegments of computer bus 204 may be joined together. By virtue of themale connectors 612 and of the female connectors 622, a plurality ofsegments of computer bus 204 may be connected in electrical continuity.

When two segments of computer bus 204 are joined, they are juxtaposedalong the Z-axis, the male connectors of a first segment are slottedinto the female connectors of a second segment and the pins 620 of thefirst segment are slotted into the cavities 630 of the second segment.

In practice, each motor start-up module 200 comprises a segment ofcomputer bus 204. Thus, when a motor start-up column 110 comprises aplurality of motor start-up modules 200, which are superposed, thesegments of computer bus 204 of all of the motor start-up modules 200are joined and electrically connected to one another.

A computer bus connector 650 is shown in FIG. 27. This connector is alsovisible in FIG. 6, joined to a communication module 134.

The computer bus connector 650 makes it possible to connect a segment ofcomputer bus 204 of a connection column 110 to the communication module134 of this connection column. Thus, each connection column 110comprises a computer bus connector 650 attached to the communicationmodule 134 of the column.

For that, the computer bus connector 650 comprises male connectors 652and female connectors 654, which are identical to the male connectors612 and to the female connectors 622, respectively, of the segment ofcomputer bus 204.

The computer bus connector 650 also comprises pins 656 and cavities 658,which are identical to the pins 620 and to the cavities 630,respectively, of the segment of computer bus 204.

Thus, the computer bus connector 650 may be joined to, and electricallyconnected to, a segment of computer bus, in the same way that twosegments of computer bus may be joined to one another, i.e. by slottinginto one another.

In addition, the fact that the computer bus connector 650 comprises maleconnectors and female connectors is advantageous, since it may be joinedeither at the top of a segment of computer bus, for example when thecommunication module 134 is arranged above the one or more motorstart-up modules 200, or at the bottom of a segment of computer bus,when the communication module 134 is arranged below the one or moremotor start-up modules 200.

In practice, just the male connectors or the female connectors are usedwhen the computer bus connector 650 is installed in a column 110. It isthen advantageous to protect the unused connectors with a cap (notshown).

In a motor start-up column 110, the computer bus 142 is formed of theassembly of a computer bus connector 650 and of one or more segments ofcomputer bus 204.

In a motor start-up column 110, the electronic circuits 604 correspondto the electronic circuits 144 of the computer bus 142, the firstelectrical power supply tracks 606 of the one or more segments ofcomputer bus correspond to the power supply tracks 148 of the computerbus 142 and the second electrical power supply tracks 608 correspond tothe power supply tracks 154 of the computer bus 142.

The connection of the computer bus 142 to the communication module takesplace via a plurality of front connectors 660. In practice, theseconnectors comprise:

-   -   A first connector 662, which is connected on the one hand to the        first connector 192 of the communication module by cables (not        shown) and on the other hand to the power supply tracks 148 of        the computer bus 142. By virtue of the first connector 662, the        power supply tracks 148 of the computer bus 142 are supplied        with first auxiliary voltage.    -   A second connector 664, which is connected on the one hand to        the protection housing 194 of the communication module 134 by        cables (not shown) and on the other hand to the power supply        tracks 154 of the computer bus 142. By virtue of the second        connector 664, the power supply tracks 154 of the computer bus        142 are supplied with second auxiliary voltage.    -   A third connector 666, which is connected on the one hand to the        managed switch 135 of the communication module 134 by cables        (not shown) and on the other hand to the electronic circuits 144        of the computer bus 142. By virtue of the third connector 666,        the electronic circuits 144 of the computer bus 142 are        connected to the managed switch 135 and may therefore exchange        information with the communication module 134.

As can be seen in FIG. 34, the segment of computer bus 204 may beequipped with jumpers 750.

A distinction is made between three types of jumpers 750 in FIGS. 34 and35:

-   -   a male end jumper 752;    -   a female end jumper 754; and    -   an input-output jumper 756.

The male 752 and female 754 end jumpers make it possible to avoid thatin a motor start-up column 110, the end of the computer bus 142—whichcomprises a plurality of segments of computer bus 204 joined to oneanother—opposite the end connected to the computer bus connector 650 isfree.

Thus, a first end of the computer bus 142 is connected to the computerbus connector 650 and a second end of the computer bus is connected to amale 752 or female 754 end jumper.

This connection makes it possible to protect the connectors 622 or 612of the segment of computer bus 204 opposite the computer bus connector.

In practice, the male end jumper 752 makes it possible to protect thefemale connectors 622 and the female end jumper 754 makes it possible toprotect the male connectors 612.

To allow the joining of the end jumpers to the segment of computer bus204, the male end jumper 752 comprises two pins 758, of complementaryshape to the cavities 630 of the first end of the segment of computerbus, and the female end jumper 754 comprises two cavities 760, ofcomplementary shape to the pins 620 of the second end of the segment ofcomputer bus.

Additionally, the end jumpers 752 and 754 make it possible to ensure thecontinuity of the electronic circuits 604 of the segment of computer bus204, corresponding, in a motor start-up column 110, to the electroniccircuits 144 of the computer bus 142.

Specifically, the electronic circuits 144, in particular when they allowan exchange of data using the Ethernet protocol, connect thecommunication module 134 of a motor start-up column 110 to themonitoring-and-control drawers 138 in series. Thus, the electroniccircuits 144 form a loop, the point of origin of which is thecommunication module 134.

When a segment of computer bus 204 comprises a free end, the end jumper752 or 754 installed on this free end makes it possible to close thisloop, by virtue of connectors connected to the electronic circuits 604,by being connected to the free end of the segment of computer bus.

In practice, the male end jumper 752 comprises male connectors 762 andthe female end jumper 754 comprises female connectors 764, which areidentical to the male connectors 612 and to the female connectors 622,respectively, of the segment of computer bus 204.

As a variant (not shown) of the invention, the motor start-up column 110does not comprise a communication module 134 and the electronic circuits144 form a loop, the point of origin of which is the industrial computer130, which then has a functional role identical to that of thecommunication module 134.

Advantageously, these male 762 and female 764 connectors also make itpossible to connect the end jumpers 752 and 754 to the electrical powersupply tracks 606 and 608.

Thus, the electrical power supply tracks 606 and 608 may supply power tothe linear connectors 610 either in parallel, or in series.Specifically, in the case of a power supply in series, the male 762 andfemale 764 end jumpers make it possible to close the loops of theelectrical power supply tracks 606 and 608.

By the same principle, the input-output jumpers 756 make it possible toclose the loop formed by the electronic circuits 144 at the level of agiven linear connector 610, when no input-output module 206 is connectedto this linear connector 610.

For that, each input-output jumper 756 has a supplementary connector766, configured to be connected to a linear connector 610.

In practice, in a motor start-up module 200, the number of input-outputjumpers 756 is dependent on the number of input-output modules 206. Thisnumber is equal to the total number of linear connectors 610 minus thenumber of input-output modules 206 of the motor start-up module 200.

Thus, in the example shown in FIG. 8, in which two input-output modules206 are connected to the segment of computer bus 204, which comprisessix linear connectors 610, four input-output jumpers 756 are connectedto the segment of computer bus, but are not shown to simplify thefigure.

Because an input-output module 206 is always associated with amonitoring-and-control drawer, it may also be considered that theinput-output jumpers 756 make it possible to close the loop formed bythe electronic circuits 144 at the level of a linear connector 610, whenno monitoring-and-control drawer is connected to this linear connector.

As can be seen in FIG. 34, the segment of computer bus 204 alsocomprises memory blocks 780, which are in practice electronic chips,also called integrated circuits.

Advantageously, the segment of computer bus 204 comprises the samenumber of memory blocks 780 and linear connectors 610.

In the example, the segment of computer bus 204 therefore comprises sixmemory blocks 780. In FIG. 34, just four memory blocks 780 are shown,through two cutaways in the housing 600 of the segment of computer bus,to simplify the figure.

Each memory block 780 is thus associated with one linear connector 610.

Thus, when the motor start-up module 200 is assembled, each memory block780 is associated with an input-output module 206, which corresponds tothe input-output module connected to the linear connector 610, and to amonitoring-and-control drawer 138, which corresponds to the drawerconnected to the input-output module connected to the linear connector610.

During the operation of the electrical enclosure 100, each memory block780 saves information and parameters regarding themonitoring-and-control drawer 138, regarding the electrical load 104connected to the monitoring-and-control drawer 138 and/or regarding theinput-output module 206 to which the drawer and the electrical load areconnected.

For example, a memory block 780 saves, regarding the electrical load 104connected to the monitoring-and-control drawer 138 associated with thememory block, all or some of the following information:

-   -   the type of the electrical load 104, such as for example a        single-phase electric motor, a three-phase electric motor, or a        drivable electrical load;    -   the operating conditions of the electrical load 104, such as for        example the electrical power required for its operation; and    -   the type of the monitoring-and-control drawer 138 that has to        control the electrical load, i.e. the representative        characteristics of the drawer, comprising for example the number        and the arrangement of the contactors of the functional elements        362 or the type of the thermal protection relay.

In practice, a memory block 780 saves in particular, regarding themonitoring-and-control drawer 138 associated with the memory block, thetype of the monitoring-and-control drawer, i.e. the representativecharacteristics of the drawer, and operating parameters of thefunctional elements 362. These operating parameters are, for example, asetting for the power to be delivered to the electrical load 104, asetting for the trip threshold for the thermal protection relay, ordetection thresholds for operation sensors.

In practice, a memory block 780 saves, regarding the input-output module206 associated with the memory block, information which is for examplethe type of the electrical load 104 connected to the input-output moduleand/or the type of the sensors arranged at the level of the electricalload and connected to the input-output module.

These operating parameters are generally saved at the level of thecontrol circuit board 364 of the monitoring-and-control drawer 138.

Additionally, each memory block 780 communicates with the communicationmodule 134 of the corresponding motor start-up column 110. Specifically,each memory block 780 is connected to the electronic circuits 604, byvirtue of connection circuits 782 visible in FIG. 34, thus allowing thiscommunication.

The memory blocks 780 are particularly advantageous during the use ofthe electrical enclosure 100, and particularly during the phases formaintaining the electrical enclosure 100.

Specifically, in the event of replacing an old monitoring-and-controldrawer 138 of a motor start-up column 110 with a newmonitoring-and-control drawer, a first verifying method is carried outby the communication module 134, or by the industrial computer 130 viathe communication module 134, comprising at least the following steps:

a) detecting the type of the old monitoring-and-control drawer 138initially installed in a given location, on the basis of the informationsaved in the memory block 780 associated with the drawer;

b) verifying whether the type of the new monitoring-and-control drawer138 installed as a replacement corresponds to the type of the old drawerand/or is compatible with the type of the electrical load 104, on thebasis of the information saved in the memory block 780 associated withthe drawer;

c) determining whether the new drawer is suitable to replace the olddrawer;

d) in the case that the new monitoring-and-control drawer 138 isdetermined in step c) as being suitable to replace the old drawer,adjusting the operating parameters of the functional elements 362 of thenew drawer, saving them in the control circuit board 364 of the newdrawer, on the basis of the information saved in the memory block 780,such that these operating parameters are identical to the operatingparameters of the old drawer; and

e) in the case that the new monitoring-and-control drawer 138 isdetermined in step c) as being unsuitable to replace the old drawer,preventing the starting up of the new monitoring-and-control drawer andsignalling an anomaly.

This first verifying method is advantageous since it makes it possibleto ensure that replacement of a monitoring-and-control drawer iscorrectly carried out and makes it possible to carry out suchreplacement without having to indicate operating parameters to the newmonitoring-and-control drawer, these operating parameters beingautomatically loaded.

Advantageously, if, during step b), it is detected that the type of thenew monitoring-and-control drawer 138 is not identical to the type ofthe old drawer, but that the new drawer is compatible with the type ofthe electrical load 104, then during step c), the new drawer isdetermined as being suitable to replace the old drawer and step d) iscarried out, and a signal indicating the difference in type between thenew drawer and the old drawer is transmitted, for example via a messagedisplayed on the display 302. For example, the newmonitoring-and-control drawer 138 may comprise functional elements 362making it possible to control an electrical load of higher power thanthe old drawer, but also suitable for controlling the electrical loadassociated with the drawer. The new drawer is then compatible with theelectrical load, and may therefore be used as a replacement for the olddrawer, even though the new drawer is of a different type from the olddrawer.

As a variant, the first verifying method is carried out by theinput-output module 206 associated with the replacedmonitoring-and-control drawer 138. The input-output module is thenequipped with a computing unit configured to execute steps a) to e) andaccess the information saved in the memory block 780 associated withthis drawer.

In the event of replacing an old input-output module 206 with a newinput-output module, which involves wiring the connection terminalblocks 510 of this module again, a second verifying method is carriedout by the communication module 134, or by the industrial computer 130via the communication module 134, comprising at least the followingsteps:

a) detecting the type of the electrical load 104 associated with the newinput-output module 206 and/or the type of the sensors arranged at thelevel of the electrical load connected to the input-output module, onthe basis of the information saved in the memory block 780 associatedwith this new input-output module;

b) verifying whether the type of this electrical load and/or of thesesensors connected to the new input-output module corresponds to the typeof the electrical load and/or of the sensors initially connected to theold input-output module;

c) determining whether the electrical load 104 and/or the sensorsconnected to the new input-output module do indeed correspond to theelectrical load 104 and/or to the sensors connected to the oldinput-output module;

d) if so, authorizing the starting up of the electrical load 104; and

e) if not, preventing the starting up of the electrical load 104 andsignalling an anomaly.

This second verifying method is advantageous since it makes it possibleto ensure that replacement of an input-output module 206 is correctlycarried out, and more particularly that the connections to theconnection terminal blocks 510 are correctly carried out.

As a variant, the second verifying method is carried out by the newinput-output module 206. The new input-output module is then equippedwith a computing unit configured to execute steps a) to e) and accessthe information saved in the memory block 780 associated with thisinput-output module.

Additionally, in the event of replacing the communication module 134 ofa motor start-up column 110, a method for retrieving data is carried outby the new communication module, which consists in retrieving theoperating parameters of the monitoring-and-control drawers 138 and/orthe information related to the electrical loads 104 on the basis of theinformation saved in the memory blocks 780 so that the new communicationmodule 134 has this information.

This method for retrieving data is particularly advantageous, since itavoids having to manually provide a large amount of data to the newcommunication module 134, which would be tedious, these data beingautomatically retrieved here.

In the variant where the motor start-up column 110 does not comprise acommunication module 134, this method for retrieving data appliessimilarly to the replacement of the industrial computer 130.

Additionally, the fact that the memory blocks 780 are arranged on thesegments of computer bus 204 is particularly advantageous, since thesegments of computer bus are reliable elements, relatively insusceptibleto faults, which are therefore generally not replaced over the servicelife of the electrical enclosure 100. Thus, the information saved inthese memory blocks 780 is not lost, even during complex maintenanceoperations in which, for example, simultaneous replacement ofmonitoring-and-control drawers 138, of the associated input-outputmodules 206 and of the communication module 134 takes place.

The connection of a drawer 138 to an electrical load 104, i.e. thesupplying of power to this electrical load by this drawer 138, takesplace via an external connection module 208. Thus, an externalconnection module 208 is associated with each drawer 138.

Three types of external connection modules 208 are shown in FIGS. 28 to33. These three types of modules together form a set of externalconnection modules 700 which is shown partially in each of thesefigures.

Each connection module of the set of modules 700 is configured to allowthe connection of a drawer 138 to an electrical load 104 consuming anelectrical power within a given data range.

A first external connection module 702 is shown in FIGS. 28 and 29. Thisfirst connection module is configured to connect a drawer 138 to anelectrical load 104 of low power, for example lower than 11 kW.

A second external connection module 704 is shown in FIGS. 30 and 31.This second connection module is configured to connect a drawer 138 toan electrical load 104 of medium power, for example of between 11 kW and30 kW.

A third external connection module 706 is shown in FIGS. 32 and 33. Thisthird connection module is configured to connect a drawer 138 to anelectrical load 104 of high power, for example of between 30 kW and 75kW.

Thus, the choice of an external connection module to be installed on amotor start-up module depends on the electrical power required by theelectrical load 104 connected to this module.

The external connection modules 702, 704 and 706 each comprise a housing708. The housing 708 comprises in practice two half-housings forming abase 708A and a hood 708B, respectively, joined by fastening means, suchas screws 708C visible only for the external connection module 702 inFIG. 29.

The housing 708 of the external connection module 702 has a height H702equal to 1U.

The housing 708 of the external connection module 704 has a height H704equal to 2U.

The housing 708 of the external connection module 706 has a height H706equal to 3U.

Preferably, the external connection module 702 is associated with adrawer 138 of height 1U or 2U, the external connection module 704 isassociated with a drawer 138 of height 2U, 3U, 4U, 5U or 6U and theexternal connection module 706 is associated with a drawer 138 of height5U or 6U. Thus, the height of an external connection module is alwaysshorter than or equal to the height of the drawer with which it isassociated.

A first end 709 of the housing 708 of each external connection modulebears input connectors 710.

The height of the first end 709 is equal to 1U, regardless of the heightof the housing 708.

A second end 711 of the housing 708 of each external connection modulebears output connectors 712.

The height of the second end 711 is equal to the height H702, H704 orH706 of the housing 708.

In practice, the input 710 and output 712 connectors are arranged on thesame face of the housing 708, i.e. when the housing is assembled on themotor start-up module 200, the input 710 and output 712 connectors facethe same face of the enclosure 100, in the example the front face F1.

In the example, the first end 709 comprises four input connectors andthe second end comprises four output connectors.

The input connectors 710 are configured to be connected to thedownstream connectors 356 of the drawer 138 associated with theconnection module. In other words, the downstream connectors 356 of adrawer supply electrical power to the external connection module 702,704 or 706 associated with this drawer. Thus, the drawer 138 is a sourceof electricity for the connection module.

The constant height of the first end 709 is advantageous since it isequal to the height of the base 328 of the drawer 138. A first end 709then allows the connection of all of the drawers 138, regardless oftheir height.

The output connectors 712 are configured to be connected to theelectrical load 104 via the connection cables 139.

In practice, the electrical connection cables 139 are connected to theoutput connectors 712 by lugs 716, as can be seen in FIG. 29.

In the housing 708, the input connectors 710 and the output connectors712 are electrically connected by cables or conductive busbars 718. Inthe first and second external connection modules 702 and 704,considering the power transmitted, it is possible to use conductivecables between the connectors 710 and 712, these cables beingrepresented by their respective centre lines in FIGS. 29 and 31. In thethird external connection module 706, considering the power transmitted,used is made, between the connectors 710 and 712, of the connectionbusbars visible in FIG. 33. In this latter case, the connectors 710 and712 are formed by the ends of the busbars 718.

In practice, each external connection module comprises four conductivecables or conductive busbars 718, i.e. one busbar per input connectorand per output connector.

The conductive cables or conductive busbars 718 are matched to the powerconsumed by the electrical load 104 connected to the output connectors712.

Thus, for an electrical load of high power, for example between 30 kWand 75 kW, the conductive busbars 718 are for example copper busbarswith a cross section of between 16 and 50 mm², for example equal to 50mm² for an electrical load of 75 kW.

In the case of an electrical load of low power, for example lower than11 kW, the conductive cables 718 are of smaller cross section, forexample of between 1 and 6 mm², for example equal to 6 mm² for anelectrical load of 11 kW.

As a variant, the conductive cables 718 of the first and second externalconnection modules 702 and 704 may be replaced with conductive busbars.

In practice, the higher the power delivered to an electrical load, thelarger the cross section of the conductive cables and conductive busbars718, which requires that the external connection module comprising suchconductive cables or conductive busbars be higher. This is why the thirdexternal connection module 706 has a height H706 greater than the heightH704 of the second module 704, itself greater than the height H702 ofthe module 702.

The second end 711 of each external connection module comprises, inaddition, a covering part 720, which covers the output connectors 712.When the covering part 720 is installed, the connectors 712 are notaccessible from the exterior of the housing 708 and are thereforeprotected, which prevents any contact with the lugs 716. When thecovering part 720 is removed, the connectors 712 are accessible, whichmakes it possible to connect the cables 139 to the connectors.

Preferably, the covering part 720 is transparent, which makes itpossible to check that the cables 139 are connected properly withoutmaking these cables accessible.

Preferably, the covering part 720 is joined to the housing 708 byfastening means, such as a screw 721 which is visible only for theexternal connection module 702.

As can be seen in FIG. 8, the housing 708 of each external connectionmodule is attached to the back support 210 of the structure 202 of themotor start-up module 200, for example using screws, at the level of itsfirst end 709, i.e. at the level of the end which comprises the inputconnectors 710.

The housing 708 therefore extends from the back support 210 as acantilever, away from the motor start-up module 200.

Additionally, the housing 708 of each external connection module 704 and706, i.e. of a module of height 2U and 3U, comprises a reinforcement722, which extends from the housing 708 parallel to the first end 709and which is also attached to the back support 210.

The reinforcement 722 has a height equal to 1U. It is formed as onepiece with the hood 708B.

The first end 709, and potentially the reinforcement 722, are arrangedin the volume V1 and in the functional region 156 of the connectioncolumn 110.

The rest of the housing 708 and the second end 711 extend into thecabling region 160 of the connection column 110.

In practice, the functional region 156 and the cabling region 160 areseparated by the lateral support 212 of the motor start-up module. Thus,the first end 709 of an external connection module 702, 704 and 706extends through the lateral support 212, and more particularly throughan opening 220 made in the lateral support 212.

The reinforcement 722 of the housing 708 of an external connectionmodule 704 and 706 also extends through an opening 220 in the lateralsupport 212.

As a variant, the external connection modules are configured so that theinput 710 and output 712 connectors are arranged on two opposite faces.Such a configuration is advantageous when the connection of the cables139 takes place via the back of the electrical enclosure 100, like inthe variant of FIG. 5.

Additionally, each drawer 138 comprises two centring members 800,arranged on the back portion 348 of the drawer and which extend alongthe Y-axis out of the drawer. Each centring member 800 has a taperedshape, i.e. its free end is narrower than its base attached to the backportion of the drawer, with which it is preferably formed as one piece.

These centring members 800 make it possible to ensure correctpositioning of the drawer 138 in the motor start-up module 200 when itis moved into its operating position.

For that, the protection unit 140 comprises centring cavities 802 andeach external connection module 702, 704 and 706 comprises a centringcavity 804.

The centring cavities 802 of the protection unit 140 are arrangedbetween the groups of connectors 246 and the interior face 238 of theprotection unit 140, as can be seen in FIG. 11.

The centring cavities 804 of each external connection module 702, 704and 706 are arranged on the hood 708B of each housing 708, close to thefirst end 709 and to the input connectors 710.

The centring cavities 802 of the protection unit and 804 of eachexternal connection module are directed towards the volume V1 of themotor start-up module 200.

The centring cavities 802 and 804 have shapes that are complementary tothose of the centring members 800 and are positioned so that in theoperating position of the drawer, a first centring member 800 of adrawer 138 is accommodated in a centring cavity 802 and a secondcentring member of a drawer 138 is accommodated in a centring cavity804.

When a drawer 138 is moved from its test position into its operatingposition, the centring members 800 of the drawer 138 are insertedgradually into the centring cavities 802 and 804 and, by virtue of thetapered shape of the centring members 800, this gradual insertion makesit possible to centre the drawer 138 in relation to the centringcavities 802 and 804 and therefore in relation to the motor start-upmodule 200.

By virtue of the external connection modules 208 of the set of modules700, the connections from the electrical loads 104 to the drawers 138are transferred from the functional region 156 to the cabling region160. This is advantageous, since the cabling region 160 is easilyaccessible, which simplifies the connection of the electrical cables 139to the output connectors 712.

As a variant, the number of types of external connection module 208within the set of external connection modules may be different fromthree, in particular equal to 2, 4, 5 or 6.

In summary, the main electrical power supply delivered by the powersupply cable 102 is conducted through the electrical enclosure 100 firstby the power supply column 106, and is then redistributed to eachprotection unit 140 of each motor start-up column 110 by the sets ofbusbars 114, 118 and 122, and is then redistributed to each drawer 138by the connectors 248 and 354, and is then redistributed to eachexternal connection module 208 by the connectors 356, and is thenredistributed to each electrical load 104 by each external connectionmodule 208.

In summary, numerous exchanges of data are performed in the electricalenclosure 100:

-   -   the operating data from sensors located on each electrical load        104 are transmitted by the input-output module 206 associated        with this load to the drawer 138 on the one hand and to the        communication module 134 on the other hand, via the computer bus        142;    -   in the drawer 138, these data are, on the one hand, taken into        account by the control circuit board 364 to adapt the operation        of the drawer 138,    -   in the drawer 138, these data are, on the other hand, if        necessary, transmitted to the protection unit 140, for example        when these data stem from the activation of an emergency stop        button located close to the electrical load 104, with the        objective of cutting the electrical power supply at the level of        the protection unit 140, and    -   in the communication module 134, these data are transmitted to        the industrial computer 130,    -   each drawer 138 transmits data on its own operation to the        communication module of the connection column 110 comprising        this drawer;    -   the communication module 134 of each connection column 110        exchanges data on the operation of this connection column to the        industrial computer 130 and to the communication modules of the        other connection columns 110 of the enclosure 100, when the        enclosure comprises a plurality of connection columns; and    -   the industrial computer 130 transmits commands to the        communication module 134 of each connection column 110, these        data are then distributed by the managed switch 135 and        transmitted to the drawers 138 by the computer bus 142 and the        input-output module 206.

The installation of a motor start-up column 110, which includes acommunication module 134 and at least one motor start-up module 200,comprises an assembly phase and a connection phase.

The assembly phase comprises steps consisting in:

a) joining the communication module 134 to the framework 164 of themotor start-up column;

b) assembling each motor start-up module 200, i.e. attaching theprotection unit 140, the segment of computer bus 204, each input-outputmodule 206 and each external connection module 208 to the structure 202of the motor start-up module;

c) attaching each motor start-up module to the framework 164, byslotting the segments of computer bus 204 into one another and byslotting the segment of computer bus of a motor start-up module onto thecomputer bus connector 650;

d) attaching an input-output jumper to each free linear connector 610and a male or female end jumper to the free end of the computer bus 142;and

e) installing the drawers 138 in each motor start-up module.

In practice, the order of steps a) to e) may be different. Inparticular, steps b), c) and d) may be reversed and step a) may becarried out at any other time. However, step e) is always subsequent tosteps a) to c).

In particular, as a variant, the structure 202 of a motor start-upmodule is first attached to the framework 164 of the motor start-upcolumn, and then the step b) of assembling the motor start-up module 200is carried out.

The connection phase allowing the commissioning of the electricalenclosure 100 is carried out after the assembly phase and comprisessteps consisting in:

a) connecting the front connectors 650 of the computer bus connector 650to the communication module 134;

b) connecting the connection terminal blocks 510 of each input-outputmodule 206 of each motor start-up module 200 to the electrical loads104, so as to connect the sensors of the electrical load to theinput-output module and to supply the electrical load with secondauxiliary voltage; and

c) connecting the external connection modules 208 to the electricalloads 104 with the cables 139, so as to supply the electrical loads 104with the main electrical power supply.

In practice, the connection of the main electrical power supply to theelectrical loads 104 only requires the connection of the cables 139.

Thus, the electrical enclosure 100 described here, and more particularlythe motor start-up column 110, is advantageous, since:

-   -   all of the connections required for the commissioning of the        electrical enclosure 100 are made in the connection region 158.        This is advantageous, since it simplifies the connections of the        electrical enclosure. In particular, no connection is required        in the functional region 156.    -   a large number of connections internal to the enclosure are made        by slotting or plugging connectors in, which is simpler than        setting up electrical connection cables.    -   the electrical cables connected in the electrical enclosure all        come from the connection region 158. Thus, their management is        simpler: when the electrical enclosure 100 comprises a cabling        region 160, like in FIG. 3, all of these cables may be grouped        together in a cable harness in this cabling region, and when the        electrical enclosure 100 does not comprise a cabling region 160,        like in FIG. 5, all of these cables may be grouped together in a        cable harness which exits from the enclosure 100 via its back        face F2.

The orientation of the elements in a motor start-up module 200 describedabove relates to a motor start-up module arranged in a connection columnlocated to the right of an electrical distributing column, in FIGS. 1 to5.

In practice, the motor start-up module 200 described above may also bearranged in a connection column located to the left of an electricaldistributing column, in FIGS. 1 to 5. For that, the motor start-upmodule 200 is simply rotated by 180 degrees about an axis parallel tothe transverse Y-axis.

Thus, a motor start-up module 200 has no favoured orientation: theprotection unit 140, the segment of computer bus 204, each drawer 138,each input-output module 206 and each external connection module 208 areconfigured to operate regardless of their spatial orientation.

For example, a drawer 138 of a connection column located to the left ofan electrical distributing column will be arranged such that its base328 is arranged at the top and its cover at the bottom. Since all of theelements contained in a drawer 138 are attached to the base 328, thisarrangement does not affect the operation of the drawer. Thisarrangement does not affect the cooling of the drawer by the air flowFL1 either, since the air flow FL1 is horizontal and is therefore notaffected by a change in orientation. Such an arrangement is visible inFIG. 1.

This operation of a motor start-up module 200 regardless of theorientation of this module is advantageous for a number of reasons:

-   -   it makes it possible to use identical parts for a connection        column located to the left or to the right of an electrical        distributing column, which is economical and facilitates the        design of an enclosure 100; and    -   it makes it possible to have two connection columns on each side        of an electrical distributing column 108—so as to form a        functional column 111—which makes it possible to share the        electrical distributing column between two connection columns,        which is economical and makes it possible to decrease the size        of the enclosure 100.

Similarly, a communication module 134 has no favoured orientation andwith respect to the orientation described in this disclosure, a moduleinstalled in a connection column located to the left of an electricaldistributing column will be rotated by 180 degrees about an axisparallel to the transverse Y-axis, in the same way as the computer busconnector 650 which is attached thereto.

The interior arrangement of the left-hand and right-hand connectioncolumn of FIGS. 1 to 5 is therefore symmetrical in relation to the planeP2 visible in FIG. 2.

Additionally, the control circuit board 364 of a drawer 138 isconfigured to detect the orientation of the drawer 138, for exampleusing a sensor integrated into the board, and to control the display 302such that the information displayed thereon is oriented so as to beeasily readable from the exterior of the enclosure 100. The display 302is therefore configured to adapt the orientation of the informationdisplayed thereon to the orientation of the drawer 138.

As a variant (not shown) of the invention, the electrical enclosure 100does not comprise any motor start-up modules and the protection unit,the segment of computer bus, the monitoring-and-control drawers, theinput-output modules and the external connection modules are directlyarranged in the electrical enclosure 100, attached to the framework 164.

In FIGS. 41 and 42, a drawer 138 of height equal to 1U is shown withoutits cover 330. This drawer is similar to the drawer shown in FIGS. 15 to17 but comprises, in addition, a position detection module 900 which isshown alone in FIG. 43.

In what follows, those elements of the drawer 138 of FIGS. 41 and 42which are analogous to those of the drawer 138 shown in FIGS. 15 to 17bear the same references and operate in the same way. In what follows,mainly the differences between the drawer of FIGS. 15 to 17 and thedrawer of FIGS. 41 and 42 are described. In addition, if a component ismentioned in the following description of the drawer 138 without beingshown in FIGS. 41 and 42, it corresponds to the same element shown inFIGS. 1 to 40.

In FIGS. 41 and 42, the functional elements 362 and the control circuitboard 364 of the drawer 138 are not shown.

The position detection module 900 is attached to the base 328 of thedrawer 138. In this example, the position detection module 900 isattached to one of the two lateral structures 346, preferably to thelateral structure that does not comprise the mechanical lock 820. As avariant, the position detection module 900 is attached to the samelateral structure as the mechanical lock 820.

The position detection module 900 comprises detectors that are intendedto detect when the drawer 138 is in the test position and to detect whenthe drawer is in the operating position. In this example, the positiondetection module comprises two detectors 902 and 904. The two detectors902 and 904 are connected to the control circuit board 364, so as totransmit information on the position of the drawer 138 to the controlcircuit board.

The position detection module 900 also comprises an actuator 906,intended to actuate the detectors 902 and 904. The actuator 906 is, inthis example, a control rod. The control rod 906 comprises a first end908 and a second end 910.

The first end 908 is attached to the mobile contact 352 of the lateralstructure 346 to which the position detection module 900 is attached.More precisely, the first end is attached to the frame 422 of the mobilecontact 352. Thus, the first end 908 is secured to the frame 422 suchthat a translation of the frame 422 along the Y-axis leads to atranslation of the control rod 906 along the Y-axis, i.e. along thelongitudinal axis A138 of the drawer. In other words, the control rod906 is mobile in translation with respect to the lateral structure 346along the longitudinal axis A138 of the drawer.

The translation of the control rod 906 with respect to the lateralstructure 346 is advantageously guided by a fixed structure 912 of theposition detection module 900, which comprises in particular guides 914at the level of the second end 910.

The fixed structure 912 is attached to the lateral structure 346, forexample by screwing. In addition, in this example, the fixed structure912 comprises two portions joined to one another, for example byriveting. In FIG. 43, the various portions of the fixed structure aredenoted by the same reference 912.

Advantageously, the position detection module 900 comprises an elasticreturn member 916. The elastic return member 916 connects the fixedstructure 912 to the control rod 906 such that, in the absence of otherforces being applied to the control rod, the control rod is returned toa position that corresponds to the position shown in FIG. 43. In otherwords, the control rod 906 has a stable position, or rest position,which is that shown in FIG. 43, and the elastic return member 916 tendsto return the control rod to that stable position.

Here, the control rod 906 comprises a stop 917, which bears against thefixed structure 912 when the control rod is in the rest position, andwhich prevents the control rod from moving beyond its rest position.Here, the stop 917 is formed of two tongues folded at right angles withrespect to the main portion of the control rod.

In this example, the elastic return member 916 is a tension spring, afirst end of which is attached to a hook 918 of the fixed structure 912and a second end of which is attached to the second end 910 of thecontrol rod.

In practice, the control rod 906 is in the rest position when the drawer138 is between its disconnected position and its engagement position,and the control rod moves along the axis A138 with respect to thelateral structure 346 when the drawer is between its engagement positionand its operating position, the same as for the frame 422.

In this example, the position detection module 900 is oriented such thatthe second end 910 of the control rod 906 is located close to thefrontal portion 300 of the drawer 138 and such that the first end 908 isat a distance from the frontal portion of the drawer. During themovement of the control rod 906, the second end 910 moves away from thedetectors 902 and 904 and comes closer to the frontal portion 300, untilit is located in the frontal portion, extending through a window 919made in the fixed structure 912. In practice, an empty space is providedin the frontal portion 300 to accommodate the presence of the second end910.

The control rod 906 comprises two top cams 920 and 922 and a bottom cam924. The two top cams 920 and 922 are located in one and the same planeparallel to the axis A138, i.e. they are aligned along the Z-axis, andare offset from the bottom cam 924 along the Z-axis. The top cams 920and 922 are provided to actuate the detector 902 and the bottom cam 924is provided to actuate the detector 904.

L920 denotes a length between the top cam 920 and an actuating element926 for the detector 902, L922 denotes a length between the top cam 922and the actuating element 926, and L924 denotes a length between thebottom cam 924 and an actuating element 928 for the detector 904, thelengths L920, L922 and L924 being measured along the axis A138.Advantageously, the length L922 is equal to the length L924.

The lengths L920, L922 and L924 have their respective maximum valueswhen the control rod 906 is in the rest position, i.e. when the drawer138 is between its disconnected position and its engagement position.

The length L920 is zero when the drawer 138 is in the test position.Thus, when the drawer is in the test position, the top cam 920 is incontact with the actuating element 926 for the detector 902, whichactuates the detector 902 and results in a detection signal being sentfrom the detector 902 to the control circuit board 364, thus informingthe control circuit board that the drawer is in the test position. Inother words, the control circuit board 364 detects that the drawer 138is in the test position when it receives a signal from the detector 902actuated by the top cam 920.

The lengths L922 and L924 are zero when the drawer 138 is in theoperating position. Thus, when the drawer is in the operating position,the top cam 922 is in contact with the actuating element 926 for thedetector 902 and the bottom cam 924 is in contact with the actuatingelement 928 for the detector 904, which simultaneously actuates thedetectors 902 and 904 and results in two detection signals being sentfrom the detectors 902 and 904 to the control circuit board 364, thusinforming the control circuit board that the drawer is in the operatingposition. In other words, the control circuit board 364 detects that thedrawer 138 is in the test position when it simultaneously receives asignal from the detector 902 and from the detector 904 actuated by thetop 922 and bottom 924 cams.

When the drawer 138 is in an intermediate position between the testposition and the operating position, the top cams and the bottom cam arenot in contact with the actuating elements for the detectors, and nodetection signal is sent to the control circuit board 364.

In this example, the detectors 902 and 904 are dry contact switches andthe actuating elements 926 and 928 are metal strips mounted so as topivot about respective axes Z926 and Z928, which are parallel to theZ-axis.

The detector 902 is connected to the control circuit board 364 by twowires 930, which are shown in a simplified manner in FIGS. 41 to 43. Thetwo wires 930 form a loop beginning and ending at the level of thecontrol circuit board, and going via the detector 902 in such a way thatthe metal strip 926 of the detector may open or close this loop. Inpractice, the loop formed by the two wires 930 is closed when the metalstrip 926 is in contact with the top cam 920 or the top cam 922, sincethe top cams then push the metal strip 926 and make it pivot about theaxis Z926, and the loop is open when the metal strip is not in contactwith a top cam. When the loop formed by the wires 930 is closed, thecontrol circuit board 364 then receives a detection signal from thedetector 902.

In the same way, the detector 904 is connected to the control circuitboard 364 by two wires 932, shown in a simplified manner in FIGS. 41 to43, which form a loop that is closed when the metal strip 928 is incontact with the bottom cam 924 and is open when the metal strip is notin contact with the bottom cam. When the loop formed by the wires 932 isclosed, the control circuit board 364 then receives a detection signalfrom the detector 904.

In this example, the control circuit board 364 is configured to detectthat the drawer 138 is in the test position when a detection signal fromthe detector 902 is received, and to detect that the drawer 138 is inthe operating position when detection signals from the detectors 902 and904 are received simultaneously.

The position detection module 900 is particularly advantageous becauseit allows the operation of the drawer 138 to be made more reliable.Specifically, by virtue of the detection of the position of the drawer138 provided by the position detection module 900, the controlling ofthe functional elements 362 by the control circuit board 364 takes theactual position of the drawer into account. The controlling of thefunctional elements 362 is thereby improved.

In addition, the operation of the position detection module 900 isparticularly reliable because the position detection module is fullyintegrated into the drawer 138, and because the position of the draweris detected only on the basis of the position of one of the mobilelateral contacts 352, by detecting the position of this lateral contactwith respect to the base 328 of the drawer. In other words, thedetection of the position of the drawer does not require any interactionwith a fixed structure of the motor start-up module 200 or of theelectrical enclosure 100 and the position detection module 900 isisolated in the drawer 138. This is particularly advantageous becausethe detection of the position of the drawer 138 is then insensitive topotential disruptions in the position of the drawer 138 with respect tothe electrical enclosure 100 around its test and operating positions,which might otherwise disrupt the detectors 902 and 904. Suchdisruptions are, for example, caused by vibrations or by impactsreceived by the drawer.

As a variant, the operating position is detected when the controlcircuit board 364 only receives a detection signal from the detector904. In such a variant, the control rod 906 does not comprise a secondtop cam 922, because the actuation of the detector 902 in the operatingposition is not required.

As a variant, the orientation of the detectors 902 and 904 is differentfrom the orientation shown in FIGS. 41 to 43, and the position of thetop 920 and 922 and bottom 924 cams is adjusted accordingly.

As a variant, the position detection module 900 does not comprise anelastic return member 916. In such a variant, the control rod 906 isreturned to its rest position by the tension springs 446, which tend tobring the frame 422, and therefore the control rod, into the restposition.

As a variant, the detectors 902 and 904 are induction switches, or Halleffect switches which detect the position of the top 920 and 922 andbottom 924 cams.

As a variant, the position detection module 900 comprises a singledetector 902 or 904 for detecting the test and operating positions.

As a variant, the drawer 138 comprises mobile contacts 352 which aremobile only along the longitudinal axis A138 of the drawer. In such avariant, the communication interfaces 353 protrude, for example, fromthe input-output modules 206 and the protection units 140, so as to comeinto contact with the mobile contacts 352 when the drawer 138 is in thetest position, and to drive the movement of the mobile contacts withrespect to the base 328 when the drawer is moved from its test positionto its operating position. In such a variant, the operation of theposition detection module 900 is unchanged.

The embodiments and the variants envisaged above may be combined tocreate new embodiments of the invention.

1. Monitoring-and-control drawer for an electrical connection enclosurecomprising a frontal portion, a back portion and functional elements,the functional elements generating heat, wherein: the frontal portion ofthe monitoring-and-control drawer comprises at least one ventilationgrille; the monitoring-and-control drawer comprises a back ventilationregion formed at the level of the back portion; the heat generated bythe functional elements of the monitoring-and-control drawer is removedby an air flow flowing through the monitoring-and-control drawer; andthe air flow enters into the monitoring-and-control drawer via eachventilation grille in the frontal portion and exits from themonitoring-and-control drawer via the back ventilation region, goingthrough the monitoring-and-control drawer from one side to the other;the monitoring-and-control drawer is configured to be connected on theone hand to an electricity source and on the other hand to an electricalload, the functional elements being configured to control the electricalload; the monitoring-and-control drawer is configured to be able to beinserted into and removed from the electrical connection enclosure bysliding, wherein the monitoring-and-control drawer comprises ahorizontal base on which the functional elements are attached, and acover, wherein the back portion of the monitoring-and-control drawer ispart of the base and comprises a group of upstream connectors, a groupof downstream connectors and a ventilation orifice which is part of theback ventilation region, wherein the upstream connectors and thedownstream connectors allows the monitoring-and-control drawer to beconnected to the electricity source and to the electrical loadrespectively, and wherein the ventilation orifice is located between thegroup of upstream connectors and the group of downstream connectors. 2.Monitoring-and-control drawer according to claim 1, wherein themonitoring-and-control drawer is configured so that the air flow passesthrough the monitoring-and-control drawer without significant change indirection.
 3. Monitoring-and-control drawer according to claim 1,wherein the monitoring-and-control drawer comprises at least one faninstalled in order to force the air flow through themonitoring-and-control drawer and arranged in the back ventilationregion and/or on the ventilation grille of the frontal portion. 4.Monitoring-and-control drawer according to claim 3, wherein themonitoring-and-control drawer comprises a control circuit board andwherein the one or more fans are controlled by the control circuitboard.
 5. Monitoring-and-control drawer according to claim 1, whereinthe monitoring-and-control drawer comprises at least one radiatorarranged on at least one functional element and configured to improvethe exchange of heat with the air flow.
 6. Monitoring-and-control draweraccording to claim 5, wherein the monitoring-and-control drawercomprises at least one deflector configured to direct the air flowtowards the one or more radiators.
 7. Electrical connection enclosure,wherein the electrical enclosure comprises at least onemonitoring-and-control drawer according to claim 1, wherein a back faceof the electrical enclosure comprises ventilation grilles and whereinthe air flow exiting from each monitoring-and-control drawer exits fromthe electrical enclosure via the ventilation grilles.
 8. Electricalconnection enclosure, wherein: the electrical enclosure comprises atleast one monitoring-and-control drawer according to claim 1; theelectrical enclosure comprises at least one chimney for the escape ofhot air; the air flow from each monitoring-and-control drawer exits intothe chimney for the escape of hot air; and the hot air from eachmonitoring-and-control drawer escapes via an upper face of the escapechimney.
 9. Electrical connection enclosure according to claim 8,wherein the electrical enclosure comprises at least one extraction fan,each extraction fan being arranged on the upper face of an escapechimney.